id:A126157 - OEIS Search Results

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Main diagonal and central terms of symmetric triangle A126155.

+0
5

1, 5, 55, 1415, 69025, 5403005, 616437655, 96365988815, 19756766836225, 5140259013390005, 1654190282113104055, 645005323804145184215, 299613583126435893179425, 163464903833408195554809005 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`a(n)=Sum_{k, 0<=k<=n}A130847(n,k)*4^k. - Philippe DELEHAM (kolotoko(AT)wanadoo.fr), Jul 22 2007`
	CROSSREFS	`Cf. A126155; A126156 (column 0), A126158 (diagonal).` `Sequence in context: A102221 A056600 A126456 this_sequence A105715 A111821 A068666` `Adjacent sequences: A126154 A126155 A126156 this_sequence A126158 A126159 A126160`
	KEYWORD	`nonn`
	AUTHOR	`Paul D. Hanna (pauldhanna(AT)juno.com), Dec 20 2006`

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Last modified September 7 15:23 EDT 2008. Contains 143483 sequences.

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