id:A137154 - OEIS Search Results

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a(n) = Sum_{k=0..n} C(2^k + n-k-1, n-k); equals the row sums of triangle A137153.

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1, 2, 4, 9, 24, 79, 331, 1803, 12954, 123983, 1592513, 27604172, 648528166, 20722205191, 903019659239, 53792176322629, 4388683843024734, 491232972054490915, 75545748143323475653, 15984344095578889888206 (list; graph; listen)

	OFFSET	`0,2`
	COMMENT	`Matrix inverse is A137156.`
	PROGRAM	`(PARI) a(n)=sum(k=0, n, binomial(2^k+n-k-1, n-k))`
	CROSSREFS	`Cf. A137153, A137155.` `Adjacent sequences: A137151 A137152 A137153 this_sequence A137155 A137156 A137157` `Sequence in context: A131351 A091352 A135934 this_sequence A098448 A006406 A097656`
	KEYWORD	`nonn`
	AUTHOR	`Paul D. Hanna (pauldhanna(AT)juno.com), Jan 24 2008`

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Last modified January 7 17:35 EST 2009. Contains 152824 sequences.

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