id:A103609 - OEIS Search Results

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Fibonacci numbers repeated (cf. A000045).

+0
3

0, 0, 1, 1, 1, 1, 2, 2, 3, 3, 5, 5, 8, 8, 13, 13, 21, 21, 34, 34, 55, 55, 89, 89, 144, 144, 233, 233, 377, 377, 610, 610, 987, 987, 1597, 1597, 2584, 2584, 4181, 4181, 6765, 6765, 10946, 10946, 17711, 17711, 28657, 28657, 46368, 46368, 75025, 75025, 121393 (list; graph; listen)

	OFFSET	`0,7`
	COMMENT	`The usual policy in the OEIS is not to include such "doubled" sequences. This is an exception. - njas`
	FORMULA	`Characteristic polynomial is x^4-x^2-1=0.` `a(n) = a(n-2)+a(n-4).`
	MATHEMATICA	`a[0] = 0; a[1] = 0; a[2] = 1; a[3] = 1; a[n_Integer?Positive] := a[n] = a[n - 2] + a[n - 4]; aa = Table[a[n], {n, 0, 200}]`
	CROSSREFS	`Sequence in context: A027189 A116575 A090492 this_sequence A129526 A000358 A032244` `Adjacent sequences: A103606 A103607 A103608 this_sequence A103610 A103611 A103612`
	KEYWORD	`nonn`
	AUTHOR	`Roger Bagula (rlbagulatftn(AT)yahoo.com), Mar 24 2005`
	EXTENSIONS	`Edited by njas, Dec 01 2006`

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.

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