id:A110323 - OEIS Search Results

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Diagonal sums of a number triangle related to the Jacobsthal numbers.

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1, 1, 7, 32, 283, 2643, 32317, 443824, 7115461, 127222805, 2541399091, 55739417376, 1335729425647, 34666455314407, 969419191792633, 29046504524166368, 928541094344685577, 31540972026299055849 (list; graph; listen)

	OFFSET	`0,3`
	COMMENT	`Diagonal sums of number triangle A110321.`
	FORMULA	`a(n)=sum{k=0..floor(n/2), (n-k)!*J(n-2k+1)/k!}, J(n)=A001045(n).`
	CROSSREFS	`Sequence in context: A034360 A050148 A024093 this_sequence A060745 A051895 A131211` `Adjacent sequences: A110320 A110321 A110322 this_sequence A110324 A110325 A110326`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Jul 20 2005`

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.

AT&T Labs Research