A299210 Expansion of 1/(1 - x*Product_{k>=1} 1/(1 + k*x^k)).

1, 1, 0, -2, -5, -3, 5, 20, 27, 17, -53, -152, -192, 31, 576, 1110, 694, -1297, -4519, -6160, -1107, 13665, 31914, 30643, -19339, -119260, -196142, -103318, 289543, 859631, 1062684, 13710, -2690348, -5675946, -4940757, 4167527, 21343918, 33874107, 16524162, -51704908, -150454546

Offset

0,4

Links

Table of n, a(n) for n=0..40.

N. J. A. Sloane, Transforms

Formula

G.f.: 1/(1 - x*Product_{k>=1} 1/(1 + k*x^k)).

a(0) = 1; a(n) = Sum_{k=1..n} A022693(k-1)*a(n-k).

Mathematica

nmax = 40; CoefficientList[Series[1/(1 - x Product[1/(1 + k x^k), {k, 1, nmax}]), {x, 0, nmax}], x]

Crossrefs

Antidiagonal sums of A297325.

Cf. A022693, A067687, A299105, A299106, A299108, A299162, A299164, A299166, A299167, A299208, A299209, A299211, A299212.

Sequence in context: A216052 A021911 A248852 * A104978 A365723 A124568

Adjacent sequences: A299207 A299208 A299209 * A299211 A299212 A299213

Keyword

sign

Author

Ilya Gutkovskiy, Feb 05 2018

Status

approved