id:A107383 - OEIS Search Results

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Quartic sub-Fibonacci sequence.

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0, 1, 1, 2, 4, 6, 12, 20, 36, 64, 112, 200, 352, 624, 1104, 1952, 3456, 6112, 10816, 19136, 33856, 59904, 105984, 187520, 331776, 587008, 1038592, 1837568, 3251200, 5752320, 10177536, 18007040, 31859712, 56369152, 99733504, 176457728 (list; graph; listen)

	OFFSET	`0,4`
	COMMENT	`Related to the real root quartic vector Markov type sequence to give real integers. Limit a[n]/a[n-1]=1.7692923`
	FORMULA	`m=2 a(n) = a[n-1]+ma[n-2]-ma[n-4]`
	MATHEMATICA	`m = 2 a[0] = 0; a[1] = 1; a[2] = 1; a[3] = 2; a[n_] := a[n] = a[n - 1] + ma[n - 2] - ma[n - 4] digits = 50`
	CROSSREFS	`Sequence in context: A068018 A060798 A134320 this_sequence A078025 A090906 A047141` `Adjacent sequences: A107380 A107381 A107382 this_sequence A107384 A107385 A107386`
	KEYWORD	`nonn,uned`
	AUTHOR	`Roger L. Bagula (rlbagulatftn(AT)yahoo.com), May 24 2005`

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Last modified July 24 12:00 EDT 2008. Contains 142294 sequences.

AT&T Labs Research