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A238164 2^floor(log[2](n+1))*(2*n+1)!*Bernoulli(2*n,1/2). 3
1, -1, 7, -465, 48006, -12072375, 6301495035, -12203470904625, 20180112406353900, -53495387545025175750, 216267236072968468547250, -1280630367874799320798794375, 10743714652441927865738713818750, -124178158916511109662405449217796875, 1930915681227482441797773554892002071875 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

Motivated by the original definition of A033473 which turned out to produce a non-integer sequence.

LINKS

M. F. Hasler, Table of n, a(n) for n = 0..50

Index entries for sequences related to Bernoulli numbers.

PROG

(PARI) n->(2*n+1)!*subst(bernpol(2*n, x), x, 1/2)<<(log(n+1)\log(2))

CROSSREFS

Sequence in context: A127908 A015105 A269550 * A112949 A254966 A261806

Adjacent sequences:  A238161 A238162 A238163 * A238165 A238166 A238167

KEYWORD

sign

AUTHOR

M. F. Hasler, Feb 18 2014

STATUS

approved

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Last modified August 11 03:22 EDT 2020. Contains 336421 sequences. (Running on oeis4.)