A098577 - OEIS

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A098577

Sum C(n-3k,2k)2^k, k=0..floor(n/5).

1, 1, 1, 1, 1, 3, 7, 13, 21, 31, 47, 77, 133, 231, 391, 645, 1053, 1727, 2863, 4781, 7989, 13303, 22071, 36565, 60621, 100655, 167295, 278077, 461989, 767143, 1273607, 2114661, 3511869, 5833055, 9688527, 16091213, 26723221, 44378967, 73700823 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,6`
	FORMULA	`G.f.: (1-x)/((1-x)^2-2x^5); a(n)=a(n-1)-a(n-2)+2a(n-5).`
	CROSSREFS	`Cf. A098575, A005253.` `Sequence in context: A206246 A171965 A011898 * A004136 A147409 A147342` `Adjacent sequences: A098574 A098575 A098576 * A098578 A098579 A098580`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Sep 16 2004`

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Last modified February 15 17:13 EST 2012. Contains 205828 sequences.