A120260 - OEIS

This site is supported by donations to The OEIS Foundation.

A120260

Diagonal sums of number triangle A120258.

1, 1, 2, 3, 8, 24, 92, 432, 2740, 23822, 264185, 3545166, 59474514, 1343942004, 41179884383, 1593533376361, 74665098131246, 4404743069577837, 351138858279113987, 37740395752334771775, 5093113605218543006445 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,3`
	FORMULA	`a(n)=sum{k=0..floor(n/2), Product{j=0..k-1, C(2n-4k+j, n-2k)/C(n-2k+j, j)}}`
	CROSSREFS	`Sequence in context: A089847 A038561 A055981 * A202592 A002619 A129202` `Adjacent sequences: A120257 A120258 A120259 * A120261 A120262 A120263`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Jun 13 2006`

Content is available under The OEIS End-User License Agreement .

Last modified February 14 18:47 EST 2012. Contains 205663 sequences.