A260329 Denominator of generalized Bernoulli number B_n^{(n-1)}.

6, 2, 10, 1, 84, 4, 90, 5, 44, 4, 5460, 70, 360, 24, 102, 1, 1596, 28, 1980, 66, 2760, 40, 81900, 273, 1512, 56, 1160, 20, 114576, 1232, 117810, 1785, 420, 4, 109668, 494, 936, 24, 27060

Offset

2,1

Links

Table of n, a(n) for n=2..40.

N. E. Nørlund, Vorlesungen ueber Differenzenrechnung Springer 1924, p. 461.

N. E. Nörlund, Vorlesungen über Differenzenrechnung, Springer-Verlag, Berlin, 1924; page 461 [Annotated scanned copy of pages 144-151 and 456-463]

Mathematica

a[n_] := Integrate[(n-t-1)*Pochhammer[t-n+2, n-1], {t, 0, 1}]*(n-1) // Denominator;
a /@ Range[2, 40] (* Jean-François Alcover, Jan 24 2020, from the formula used in the bisections *)

Crossrefs

Cf. A260328.

Sequence in context: A235362 A018801 A055021 * A141379 A357396 A100616

Adjacent sequences: A260326 A260327 A260328 * A260330 A260331 A260332

Keyword

nonn,frac

Author

N. J. A. Sloane, Jul 25 2015

Extensions

More terms from Jean-François Alcover, Jan 25 2020

Status

approved