A107365 - OEIS

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A107365

Indices of primes occurring in A030284.

1, 2, 3, 4, 5, 9, 13, 16, 18, 21, 24, 26, 48, 79, 99, 110, 129, 140, 187, 304, 566, 670, 798, 905, 1020, 1119, 1346, 2266, 3354, 5140, 7043, 7854, 10548, 17986, 26886, 33861, 42373, 49100, 57393, 63954, 72099, 148934, 290510, 348529, 483751, 539780

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OFFSET

1,2

LINKS

Table of n, a(n) for n=1..46.

FORMULA

a(n)=pi(A030284(n))

MATHEMATICA

d=2; b={1}; Do[p=Prime[n]; If[Intersection@@IntegerDigits/@{d, p}=={}, b=Append[b, n]; d=p], {n, 100000000}]; b

CROSSREFS

Cf. A030284 = Primes whose digits do not appear in previous term.

Sequence in context: A319720 A140298 A253181 * A026484 A120760 A245449

Adjacent sequences: A107362 A107363 A107364 * A107366 A107367 A107368

KEYWORD

nonn

AUTHOR

Zak Seidov, May 24 2005

STATUS

approved