id:A099577 - OEIS Search Results

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Diagonal sums of triangle A099575.

+0
3

1, 1, 2, 2, 6, 7, 13, 15, 38, 47, 85, 104, 245, 313, 558, 706, 1594, 2080, 3674, 4753, 10429, 13817, 24246, 31875, 68497, 91804, 160301, 213345, 451166, 610247, 1061413, 1426503, 2978230, 4058629, 7036859, 9533213, 19694622, 27007760 (list; graph; listen)

	OFFSET	`0,3`
	FORMULA	`a(n)=sum{k=0..floor(n/2), sum{j=0..floor(k/2), binomial(n-k+j, j)}`
	CROSSREFS	`Cf. A099574.` `Sequence in context: A079811 A097869 A060303 this_sequence A106168 A106166 A101343` `Adjacent sequences: A099574 A099575 A099576 this_sequence A099578 A099579 A099580`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Oct 23 2004`

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Last modified December 11 12:57 EST 2009. Contains 170656 sequences.

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