A152536 a(n) = Sum_{k=0..binomial(n,2)} (-1)^k*A152534(n,k).

1, 1, 1, 2, 3, 6, 10, 23, 47, 110, 246, 617, 1602, 4035, 11481, 29927, 95503, 249926, 871030, 2316317, 8879558, 23674841, 98329551, 264329177, 1191578522, 3207278255, 15543026747, 42011308653, 218668538441, 591460307157, 3285749117475, 8905905152798, 52700813279423

Offset

0,4

Links

Alois P. Heinz, Table of n, a(n) for n = 0..100

Maple

A152536 := proc(n)
    add( (-1)^k*A152534(n, k), k=0..binomial(n, 2)) ;
end proc: # R. J. Mathar, Jun 15 2013

Crossrefs

Cf. A152534.

Sequence in context: A122381 A141034 A300442 * A185164 A124345 A123256

Adjacent sequences: A152533 A152534 A152535 * A152537 A152538 A152539

Keyword

nonn

Author

Vladeta Jovovic, Dec 06 2008

Extensions

a(17)-a(20) from Vaclav Kotesovec, May 24 2020

a(0), a(21)-a(32) from Alois P. Heinz, Aug 09 2021

Status

approved