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Every third term of A083946 where the self-convolution third power is congruent modulo 9 to A083946, which consists entirely of numbers 1 through 6.
+10
3
1, 2, 6, 4, 6, 4, 3, 2, 6, 4, 2, 6, 6, 4, 4, 2, 4, 2, 6, 4, 3, 4, 2, 6, 1, 4, 2, 2, 3, 4, 1, 6, 6, 2, 6, 6, 1, 6, 2, 6, 6, 2, 4, 6, 2, 4, 4, 4, 2, 6, 6, 2, 2, 6, 4, 4, 2, 6, 6, 4, 5, 4, 2, 6, 2, 4, 1, 2, 5, 2, 3, 4, 6, 6, 6, 6, 2, 4, 5, 2, 3, 2, 1, 2, 4, 2, 5, 2, 4, 2, 6, 2, 2, 4, 4, 4, 3, 2, 1, 2, 6, 6, 2, 6, 3
EXAMPLE
A(x) = 1 + 2*x + 6*x^2 + 4*x^3 + 6*x^4 + 4*x^5 + 3*x^6 + ...
A(x)^3 = 1 + 6*x + 30*x^2 + 92*x^3 + 246*x^4 + 492*x^5 + ...
A(x)^3 (mod 9) = 1 + 6*x + 3*x^2 + 2*x^3 + 3*x^4 + 6*x^5 + ...
G(x) = 1 + 6*x + 3*x^2 + 2*x^3 + 3*x^4 + 6*x^5 + ...
PROG
(PARI) {a(n)=local(d=3, m=6, A=1+m*x); for(j=2, d*n, for(k=1, m, t=polcoeff((A+k*x^j+x*O(x^j))^(1/m), j); if(denominator(t)==1, A=A+k*x^j; break))); polcoeff(A, d*n)}
Every 2nd term of A083946 where the self-convolution 2nd power is congruent modulo 4 to A083946, which consists entirely of numbers 1 through 6.
+10
2
1, 3, 3, 6, 3, 6, 6, 3, 6, 3, 6, 3, 6, 3, 6, 2, 6, 6, 6, 3, 6, 4, 6, 6, 4, 3, 3, 6, 3, 3, 3, 3, 6, 2, 3, 3, 1, 6, 6, 2, 6, 6, 3, 3, 6, 1, 6, 6, 6, 3, 6, 6, 3, 6, 1, 6, 6, 2, 3, 6, 6, 3, 3, 4, 6, 6, 2, 3, 6, 4, 3, 6, 2, 6, 3, 6, 3, 6, 2, 6, 6, 4, 3, 3, 2, 3, 3, 6, 3, 3, 5, 3, 3, 2, 6, 6, 2, 3, 6, 1, 3, 3, 5, 3, 6
EXAMPLE
A(x) = 1 + 3*x + 3*x^2 + 6*x^3 + 3*x^4 + 6*x^5 + 6*x^6 +...
A(x)^2 = 1 + 6*x + 15*x^2 + 30*x^3 + 51*x^4 + 66*x^5 +...
A(x)^2 (mod 4) = 1 + 2*x + 3*x^2 + 2*x^3 + 3*x^4 + 2*x^5 +...
G(x) = 1 + 6*x + 3*x^2 + 2*x^3 + 3*x^4 + 6*x^5 +...
PROG
(PARI) {a(n)=local(d=2, m=6, A=1+m*x); for(j=2, d*n, for(k=1, m, t=polcoeff((A+k*x^j+x*O(x^j))^(1/m), j); if(denominator(t)==1, A=A+k*x^j; break))); polcoeff(A, d*n)}
Every 8th term of A083948 where the self-convolution 8th power is congruent modulo 16 to A083948, which consists entirely of numbers 1 through 8.
+10
2
1, 7, 3, 1, 6, 6, 4, 8, 7, 8, 8, 7, 3, 3, 3, 1, 4, 3, 6, 5, 1, 6, 6, 1, 1, 5, 4, 8, 5, 5, 4, 6, 5, 8, 7, 6, 5, 6, 6, 5, 8, 4, 7, 4, 1, 3, 7, 7, 4, 6, 8, 7, 4, 8, 8, 1, 5, 3, 5, 5, 6, 2, 4, 4, 7, 2, 6, 2, 1, 4, 3, 5, 5, 3, 5, 1, 5, 3, 7, 8, 6, 5, 1, 2, 1, 1, 2, 4, 6, 1, 6, 3, 5, 1, 7, 3, 4, 2, 6, 7, 1, 3, 1, 8, 3
EXAMPLE
A(x) = 1 + 7*x + 3*x^2 + x^3 + 6*x^4 + 6*x^5 + 4*x^6 + 8*x^7 +...
A(x)^8 = 1 + 56*x + 1396*x^2 + 20392*x^3 + 193458*x^4 +...
A(x)^8 (mod 16) = 1 + 8*x + 4*x^2 + 8*x^3 + 2*x^4 + 8*x^5 +...
G(x) = 1 + 8*x + 4*x^2 + 8*x^3 + 2*x^4 + 8*x^5 + 4*x^6 +...
PROG
(PARI) {a(n)=local(d=8, m=8, A=1+m*x); for(j=2, d*n, for(k=1, m, t=polcoeff((A+k*x^j+x*O(x^j))^(1/m), j); if(denominator(t)==1, A=A+k*x^j; break))); polcoeff(A, d*n)}
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