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A033471 Denominator of Bernoulli(2n,1/3). 1
1, 18, 810, 10206, 65610, 1299078, 483611310, 9565938, 7317942570, 103053850074, 383546284110, 1443528742014, 257010878197710, 5083731656658, 6634269811938690, 982924264619854326, 315013432104812970 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..16.

Index entries for sequences related to Bernoulli numbers.

MAPLE

with(numtheory): seq(denom(bernoulli(2*n, 1/3)), n=0..20);

MATHEMATICA

Denominator/@BernoulliB[2Range[0, 20], 1/3] (* Harvey P. Dale, May 11 2011 *)

PROG

(PARI) a(n) = denominator(subst(bernpol(2*n), x, 1/3)); \\ Michel Marcus, Sep 16 2020

CROSSREFS

Cf. A033470 (numerators).

Sequence in context: A180781 A264468 A303991 * A128074 A049655 A145615

Adjacent sequences:  A033468 A033469 A033470 * A033472 A033473 A033474

KEYWORD

nonn,frac

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified January 21 03:16 EST 2021. Contains 340332 sequences. (Running on oeis4.)