id:A118802 - OEIS Search Results

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Row squared sums of triangle A118801: a(n) = Sum_{k=0..n} A118801(n,k)^2.

+0
3

1, 2, 11, 76, 565, 4406, 35455, 291264, 2427113, 20436202, 173435251, 1481052596, 12711044125, 109543953182, 947334302951, 8216780507176, 71450654876625, 622692860482514, 5437356743763163, 47561030194674972, 416661242790844421 (list; graph; listen)

	OFFSET	`0,2`
	COMMENT	`Self-convolution of A118803.`
	PROGRAM	`(PARI) {a(n)=sum(k=0, n, (1+(-1)^k2^(n-k+1)sum(j=0, k\2, binomial(n-2j-2, k-2j-1)))^2)}`
	CROSSREFS	`Cf. A118801, A118803.` `Sequence in context: A112894 A049363 A055085 this_sequence A053481 A110329 A006766` `Adjacent sequences: A118799 A118800 A118801 this_sequence A118803 A118804 A118805`
	KEYWORD	`nonn`
	AUTHOR	`Paul D. Hanna (pauldhanna(AT)juno.com), May 02 2006`

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Last modified December 9 18:50 EST 2009. Contains 170568 sequences.

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