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A113573

a(n) = A113572(n)/n.

1, 6, 41, 306, 2449, 20404, 174895, 1530303, 13602694, 0, 1112947677, 10202020369, 94172495711, 874458888747, 0, 76515152765153, 720142614260276, 6801346912458046, 64433812854865493, 0, 5829725924964020204, 55647383829202011022, 532279323583671409769, 5101010184343517676851, 0, 470862478554786247093941

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OFFSET

1,2

COMMENTS

a(5*t) = 0 for t > 1. Conjecture: No other term is zero.

LINKS

Sean A. Irvine, Table of n, a(n) for n = 1..1000

EXAMPLE

a(6) = 122424/6 = 20404.

CROSSREFS

Cf. A113572.

Sequence in context: A143023 A078009 A127848 * A083161 A077147 A100770