id:A116384 - OEIS Search Results

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Diagonal sums of the Riordan array A116382.

+0
2

1, 0, 3, 1, 10, 6, 36, 28, 135, 121, 517, 507, 2003, 2093, 7815, 8569, 30634, 34902, 120480, 141664, 475002, 573574, 1876294, 2318010, 7422676, 9354540, 29400192, 37708672, 116567356, 151868100, 462561572, 611180252, 1836843591, 2458123705 (list; graph; listen)

	OFFSET	`0,3`
	FORMULA	`a(n)=sum{k=0..floor(n/2), sum{j=0..n-k, (-1)^(n-k-j)C(n-k,j)sum{i=0..j, C(j,i-k)C(i,j-i)}}}.`
	CROSSREFS	`Sequence in context: A035324 A091965 A107056 this_sequence A117207 A046658 A124574` `Adjacent sequences: A116381 A116382 A116383 this_sequence A116385 A116386 A116387`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Feb 12 2006`

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Last modified July 26 13:41 EDT 2008. Contains 142293 sequences.

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