id:A099556 - OEIS Search Results

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Row sums of triangle A099555, so that a(n) = Sum_{k=0..2n} (n-[k/2])^k where [k/2] is the integer floor of k/2.

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1, 2, 5, 18, 91, 604, 5123, 53808, 679389, 10107934, 174544505, 3451802006, 77302457077, 1942469215378, 54339334896457, 1680597905918398, 57116435365152501, 2121725699286935222, 85740960693607190593 (list; graph; listen)

	OFFSET	`1,2`
	PROGRAM	`(PARI) a(n)=sum(k=0, 2*n, (n-k\2)^k)`
	CROSSREFS	`Cf. A099555.` `Adjacent sequences: A099553 A099554 A099555 this_sequence A099557 A099558 A099559` `Sequence in context: A005500 A020025 A113715 this_sequence A057864 A032273 A143522`
	KEYWORD	`nonn`
	AUTHOR	`Paul D. Hanna (pauldhanna(AT)juno.com), Oct 22 2004`

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Last modified October 9 14:06 EDT 2008. Contains 144831 sequences.

AT&T Labs Research