id:A099574 - OEIS Search Results

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Diagonal sums of triangle A099574.

+0
3

1, 1, 2, 2, 4, 5, 9, 11, 18, 23, 37, 48, 74, 97, 147, 195, 290, 387, 568, 763, 1108, 1495, 2152, 2915, 4167, 5662, 8047, 10962, 15506, 21168, 29825, 40787, 57280, 78448, 109870, 150657, 210521, 288969, 403020, 553677, 770963, 1059932, 1473898 (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. A099577.` `Sequence in context: A051630 A050045 A098386 this_sequence A144118 A089935 A038000` `Adjacent sequences: A099571 A099572 A099573 this_sequence A099575 A099576 A099577`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Oct 23 2004`

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.

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