cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

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A114648 Number of occurrences of 6 as a denominator in Bernoulli(k) for 0<=k<=10^n.

Original entry on oeis.org

0, 1, 10, 87, 834, 7992, 77696, 758582, 7436825, 73129588, 720726912
Offset: 0

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Author

Eric W. Weisstein, Dec 21 2005

Keywords

Crossrefs

Programs

  • Mathematica
    DenominatorBernoulliBQ[n_Integer, denom_Integer] := If[EvenQ[n], Times @@ Select[Divisors[n] + 1, PrimeQ] == denom, 1 + KroneckerDelta[n, 1] == denom]; A114648[n_] := A114648[n] = Length[Select[Range[10^n], DenominatorBernoulliBQ[#, 6] &]] (* Enrique Pérez Herrero, Aug 01 2010 *)

Extensions

More terms added by Enrique Pérez Herrero, Aug 01 2010
More terms from Enrique Pérez Herrero, Aug 16 2010
a(10) from Arkadiusz Wesolowski, Dec 02 2012
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