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A322381 Denominator of the sum of inverse products of parts in all strict partitions of n. 8
1, 1, 2, 6, 12, 60, 120, 280, 168, 210, 1680, 2640, 332640, 4324320, 8648640, 43243200, 900900, 735134400, 3150576, 2618916300, 83805321600, 586637251200, 586637251200, 749592043200, 2248776129600, 642507465600, 13492656777600, 41644002400, 53970627110400 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Alois P. Heinz, Table of n, a(n) for n = 0..1268

Andreas B. G. Blobel, An Asymptotic Form of the Generating Function Prod_{k=1,oo} (1+x^k/k), arXiv:1904.07808 [math.CO], 2019.

MAPLE

b:= proc(n, i) option remember; `if`(n=0, 1, `if`(i<1, 0,

      b(n, i-1) +b(n-i, min(i-1, n-i))/i))

    end:

a:= n-> denom(b(n$2)):

seq(a(n), n=0..30);

CROSSREFS

See A322380 for more information.

Sequence in context: A072181 A283487 A126915 * A265125 A002201 A263572

Adjacent sequences:  A322378 A322379 A322380 * A322382 A322383 A322384

KEYWORD

nonn,frac,changed

AUTHOR

Alois P. Heinz, Dec 05 2018

STATUS

approved

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Last modified April 24 12:01 EDT 2019. Contains 322429 sequences. (Running on oeis4.)