id:A110129 - OEIS Search Results

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Central coefficients of a scaled Legendre triangle.

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1, 2, 22, 504, 16966, 752800, 41492284, 2734083968, 209681631814, 18348172005888, 1804161160185748, 196945525458761728, 23633625832975567644, 3092337510752711057408, 438161926888980929318584 (list; graph; listen)

	OFFSET	`0,2`
	COMMENT	`Central coefficients of triangle A110124.`
	FORMULA	`a(n)=2^nLegendreP(n, n); a(n)=sum{j=0..floor(n/2), (-1)^jC(n, j)C(2n-2j, n)n^(n-2j).`
	CROSSREFS	`Sequence in context: A137076 A090730 A090313 this_sequence A120419 A132568 A015210` `Adjacent sequences: A110126 A110127 A110128 this_sequence A110130 A110131 A110132`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Jul 13 2005`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

AT&T Labs Research