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Search: id:A126152
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A126152 Main diagonal of symmetric triangle A126150: a(n) = A126150(n,n). +0
5
1, 4, 36, 744, 28536, 1736064, 152914176, 18372559104, 2885671339776, 573765893121024, 140835811776316416, 41820352964911908864, 14774712204104658671616, 6124078747943873540112384 (list; graph; listen)
OFFSET

0,2

FORMULA

a(n)=Sum_{k, 0<=k<=n}A130847(n,k)*3^k. - Philippe DELEHAM (kolotoko(AT)wanadoo.fr), Jul 22 2007

CROSSREFS

Cf. A126150; A126151 (column 0), A126153 (diagonal).

Sequence in context: A163887 A156630 A145565 this_sequence A009446 A134052 A127901

Adjacent sequences: A126149 A126150 A126151 this_sequence A126153 A126154 A126155

KEYWORD

nonn

AUTHOR

Paul D. Hanna (pauldhanna(AT)juno.com), Dec 19 2006

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.


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