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A140352 Denominators of Bernoulli twin numbers polynomial coefficients. 0
1, -2, 1, -3, 1, -6, -2, 2, 1, -30, -2, -2, 1, 1, 30, -6, -1, -3, 2, 1, 42, 6, -2, -3, 1, 1, -42, 6, 2, -6, -2, 2, 2, 1, -30, -6, 3, 6, -3, -2, 6, 1, 1, 30, -10, -3, 1, 3, -5, -3, 1, 2, 1, 66, 10, -2, -1, 1, 5, -1, -1, 1, 1, 1 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

See numerators A140334, when numerator is 0, no entry is entered here.

LINKS

Table of n, a(n) for n=0..63.

EXAMPLE

Triangle starts:

1;

-2, 1;

-3, 1;

-6, -2, 2, 1;

MATHEMATICA

c[0, x_] = 1; c[n_, x_] := Sum[Binomial[n-1, j-1] BernoulliB[j, x], {j, 1, n}]; Table[CoefficientList[c[n, x], x], {n, 0, 10}] // Flatten // Select[#, # != 0 &]& // Sign[#]*Denominator[#]& (* Jean-Fran├žois Alcover, Sep 12 2013 *)

CROSSREFS

Cf. A140351, A129378.

Sequence in context: A034850 A220377 A145969 * A277130 A082588 A006241

Adjacent sequences:  A140349 A140350 A140351 * A140353 A140354 A140355

KEYWORD

sign,tabf,frac

AUTHOR

Paul Curtz, May 30 2008

STATUS

approved

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Last modified November 16 20:09 EST 2019. Contains 329206 sequences. (Running on oeis4.)