A099598 - OEIS

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A099598

Antidiagonal sums of array A099597.

1, 2, 4, 8, 19, 50, 162, 576, 2469, 11218, 59984, 331432, 2120663, 13784290, 102616622, 766648128, 6507054537, 54919451490, 523342287196, 4923469621256, 52040350449307, 539901936037202, 6268123599148282 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,2`
	FORMULA	`a(n)=sum{k=0..n, C(n,k)*(floor(k/2)!)^2}; a(n)=sum{k=0..n, sum{j=0..n-k, C(n-k,j)C(k,j)j!^2}}; - Paul Barry (pbarry(AT)wit.ie), May 26 2007`
	CROSSREFS	`Sequence in context: A172383 A003081 A100133 * A173310 A128816 A006897` `Adjacent sequences: A099595 A099596 A099597 * A099599 A099600 A099601`
	KEYWORD	`nonn`
	AUTHOR	`Ralf Stephan, Oct 28 2004`

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Last modified February 16 03:44 EST 2012. Contains 205860 sequences.