id:A087827 - OEIS Search Results

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a(n) = a(a(Min(n-1,Abs(n-a(n-1)))+a(Abs(n-a(n-3))

+0
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1, 1, 1, 2, 3, 4, 4, 4, 4, 6, 5, 6, 6, 6, 6, 10, 7, 9, 8, 10, 9, 10, 10, 10, 10, 16, 10, 13, 12, 14, 13, 14, 12, 15, 15, 14, 16, 16, 16, 16, 16, 26, 14, 19, 18, 20, 19, 20, 18, 19, 19, 21, 21, 21, 21, 21, 20, 26, 22, 26, 21, 26, 26, 24, 26, 26, 24, 34, 20, 28, 22, 29, 26, 31, 28, 29 (list; graph; listen)

	OFFSET	`0,4`
	COMMENT	`A triple recursion of the skip one Hofstadter Q.`
	MATHEMATICA	`Hofstadter3[n_Integer?Positive] := Hofstadter3[n] = Hofstadter3[Hofstadter3[Min[n-1, Abs[n - Hofstadter3[n-1]]]]] + Hofstadter3[Abs[n - Hofstadter3[n-3]]] Hofstadter3[0]=Hofstadter3[1] = Hofstadter3[2]= Hofstadter3[3]= 1 digits=200 ta=Table[Hofstadter3[n], {n, 1, digits}]`
	CROSSREFS	`Cf. A005185.` `Sequence in context: A120509 A029106 A064004 this_sequence A136528 A130242 A130245` `Adjacent sequences: A087824 A087825 A087826 this_sequence A087828 A087829 A087830`
	KEYWORD	`nonn`
	AUTHOR	`Roger L. Bagula (rlbagulatftn(AT)yahoo.com), Oct 06 2003`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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