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 A113573 A113572(n)/n. 2
 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 (list; graph; refs; listen; history; text; internal format)
 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 Adjacent sequences:  A113570 A113571 A113572 * A113574 A113575 A113576 KEYWORD base,easy,nonn AUTHOR Amarnath Murthy, Nov 06 2005 EXTENSIONS Corrected and extended by R. J. Mathar, Aug 29 2007 Corrected and extended by Sean A. Irvine, Jan 17 2011 STATUS approved

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Last modified May 18 17:28 EDT 2021. Contains 343996 sequences. (Running on oeis4.)