A285063 Denominators of the exponential expansion of (4/(log(1+x)))*(1 - 1/(1+x)^(1/4)).

1, 8, 48, 256, 3840, 6144, 86016, 393216, 2949120, 2621440, 34603008, 50331648, 22900899840, 2013265920, 12079595520, 17179869184, 3285649981440, 309237645312, 27419071217664, 23089744183296

Offset

0,2

Comments

For the numerators see A285062, also for the rationals r(n) = A285062(n)/a(n), the z-sequence of the Sheffer triangle S2[4,1].

Links

Table of n, a(n) for n=0..19.

Formula

E.g.f. for sequence {r(n) = A285062(n)/a(n)}: (4/(log(1+x)))*(1 - 1/(1+x)^(1/4)).

Example

See A285062.

Mathematica

With[{nn=20}, CoefficientList[Series[4/Log[1+x] (1-Surd[1/(1+x), 4]), {x, 0, nn}], x] Range[0, nn]!]//Denominator (* Harvey P. Dale, May 12 2026 *)

Crossrefs

Cf. A285061, A285062.

Sequence in context: A292536 A242668 A002697 * A026761 A026706 A128734

Adjacent sequences: A285060 A285061 A285062 * A285064 A285065 A285066

Keyword

nonn,frac,easy

Author

Wolfdieter Lang, Apr 13 2017

Status

approved