id:A113140 - OEIS Search Results

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Diagonal sums of a Delannoy related triangle.

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1, 3, 14, 68, 347, 1819, 9712, 52532, 286905, 1578679, 8738278, 48601968, 271406347, 1520725095, 8545396208, 48138689272, 271768537793, 1537212749339, 8709732836238, 49423440297324, 280835252080651, 1597731101233763 (list; graph; listen)

	OFFSET	`0,2`
	COMMENT	`Diagonal sums of A113139.`
	FORMULA	`a(n)=sum{k=0..floor(n/2), sum{j=0..n-k, C(n-2k, j)C(n-k+j, k+j)}}.`
	CROSSREFS	`Adjacent sequences: A113137 A113138 A113139 this_sequence A113141 A113142 A113143` `Sequence in context: A151322 A002320 A151323 this_sequence A151324 A121185 A151325`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Oct 15 2005`

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Last modified November 8 07:45 EST 2009. Contains 166143 sequences.

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