id:A081584 - OEIS Search Results

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Fourth row of Pascal-(1,2,1) array A081577.

+0
3

1, 13, 79, 307, 886, 2086, 4258, 7834, 13327, 21331, 32521, 47653, 67564, 93172, 125476, 165556, 214573, 273769, 344467, 428071, 526066, 640018, 771574, 922462, 1094491, 1289551, 1509613, 1756729, 2033032, 2340736, 2682136, 3059608 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`a(n)=(8+6n+81n^2-18n^3+27n^4)/8. G.f. (1+2x)^4/(1-x)^5.`
	CROSSREFS	`Cf. A081583.` `Sequence in context: A060216 A041318 A142056 this_sequence A125323 A075584 A126481` `Adjacent sequences: A081581 A081582 A081583 this_sequence A081585 A081586 A081587`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Mar 23 2003`

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.

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