A099577 - OEIS

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A099577

Diagonal sums of triangle A099575.

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; refs; listen; history; internal format)

	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 * A106168 A106166 A101343` `Adjacent sequences: A099574 A099575 A099576 * A099578 A099579 A099580`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Oct 23 2004`

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Last modified February 15 15:20 EST 2012. Contains 205823 sequences.