id:A107229 - OEIS Search Results

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Fibonacci type sequence based on Wallis's constant A007493: characteristic polynomial: (x^3-2*x+5).

+0
1

1, 1, 1, 3, 3, 11, 9, 7, 73, 59, 181, 483, 657, 1871, 3729, 7027, 16813, 32699, 68761, 149463, 301017, 642731, 1349349, 2790547, 5912353, 12327839, 25777441, 54217443, 113194077, 237322091, 497475369, 1040614567, 2181561193 (list; graph; listen)

	OFFSET	`0,4`
	FORMULA	`f(n)=2f(n-2)-5f(n-3) a(n)=Abs(f(n))`
	MATHEMATICA	`F[1] = 1; F[2] = 1; F[3] = 1; F[n__] := F[n] = 2F[n - 2] - 5F[n - 3] b = Table[Abs[F[n]], {n, 1, 50}]`
	CROSSREFS	`Cf. A007493.` `Sequence in context: A101326 A036391 A073106 this_sequence A122167 A095019 A068594` `Adjacent sequences: A107226 A107227 A107228 this_sequence A107230 A107231 A107232`
	KEYWORD	`nonn,uned`
	AUTHOR	`Roger L. Bagula (rlbagulatftn(AT)yahoo.com), Jun 08 2005`

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Last modified July 26 13:41 EDT 2008. Contains 142293 sequences.

AT&T Labs Research