id:A070871 - OEIS Search Results

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A002487(n-1)*A002487(n) (Conway's alimentary function).

+0
8

1, 2, 2, 3, 6, 6, 3, 4, 12, 15, 10, 10, 15, 12, 4, 5, 20, 28, 21, 24, 40, 35, 14, 14, 35, 40, 24, 21, 28, 20, 5, 6, 30, 45, 36, 44, 77, 70, 30, 33, 88, 104, 65, 60, 84, 63, 18, 18, 63, 84, 60, 65, 104, 88, 33, 30, 70, 77, 44, 36, 45, 30, 6, 7, 42, 66 (list; graph; listen)

	OFFSET	`1,2`
	LINKS	`Robert G. Wilson v, Plot of first 4096 terms`
	FORMULA	`Sum of reciprocals of k-th "chunk" (between two entries k) = 1 (for example for the third chunk, 1/3 + 1/6 + 1/6 + 1/3 = 1).`
	MATHEMATICA	`a[0] = 1; a[n_] := If[ OddQ[n], a[n/2 - 1/2], a[n/2] + a[n/2 - 1]]; Table[ a[n - 1]*a[n], {n, 1, 70}]`
	CROSSREFS	`Cf. A002487, A070872-A070874.` `Sequence in context: A137757 A132886 A119272 this_sequence A096115 A093919 A068424` `Adjacent sequences: A070868 A070869 A070870 this_sequence A070872 A070873 A070874`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), May 19 2002`

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Last modified December 9 18:50 EST 2009. Contains 170568 sequences.

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