A324880 - OEIS

A324880

Even numbers k such that A324863(k) = A324874(k).

16, 64, 90, 256, 484, 490, 750, 756, 810, 988, 1000, 1024, 1296, 1440, 2116, 2622, 2662, 3630, 3710, 4004, 4116, 4624, 4896, 4900, 5880, 6426, 6724, 6760, 7290, 7744, 7840, 7920, 8100, 8924, 9604, 10000

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OFFSET

1,1

COMMENTS

Of 36 such numbers found in the range 1..10000, the following ten: 90, 490, 750, 810, 2622, 2662, 3630, 3710, 6426, 7290, are such that a positive integer of the form 4m+1 is produced when A156552 is applied to them: 45, 105, 117, 189, 225, 405, 765, 2205, 2565, 262185 (when sorted into ascending order). See also A324647.

LINKS

Table of n, a(n) for n=1..36.

Index entries for sequences related to binary expansion of n

Index entries for sequences computed from indices in prime factorization

Index entries for sequences related to sigma(n)

PROG

(PARI) for(n=1, 10000, if(!(n%2)&&A324863(n)==A324874(n), print1(n, ", ")));

CROSSREFS

Cf. A156552, A323243, A324398, A324647, A324863, A324866, A324874.

Subsequence of A324879.

Sequence in context: A352475 A305242 A039370 * A304476 A129588 A043193

Adjacent sequences: A324877 A324878 A324879 * A324881 A324882 A324883

KEYWORD

nonn

AUTHOR

Antti Karttunen, Mar 27 2019

STATUS

approved