id:A098581 - OEIS Search Results

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Expansion of (1+2x+4x^2)/(1-x-8x^4).

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1, 3, 7, 7, 15, 39, 95, 151, 271, 583, 1343, 2551, 4719, 9383, 20127, 40535, 78287, 153351, 314367, 638647, 1264943, 2491751, 5006687, 10115863, 20235407, 40169415, 80222911, 161149815, 323033071, 644388391, 1286171679, 2575370199 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`a(n)=a(n-1)+8a(n-4); a(n)=sum{k=0..n, binomial(n-k, floor(k/3))2^k}.`
	CROSSREFS	`Cf. A078467, A097334.` `Sequence in context: A059478 A081218 A130003 this_sequence A085420 A160994 A113833` `Adjacent sequences: A098578 A098579 A098580 this_sequence A098582 A098583 A098584`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Sep 16 2004`

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Last modified December 18 21:37 EST 2009. Contains 171024 sequences.

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