id:A100721 - OEIS Search Results

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a(n)=n-a(a(a(a(a(a(n-1)))))), a(1)=1.

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1, 1, 2, 3, 4, 5, 6, 7, 7, 8, 8, 9, 10, 10, 11, 12, 13, 13, 14, 15, 16, 17, 17, 18, 19, 20, 21, 22, 22, 23, 24, 25, 26, 27, 28, 28, 29, 30, 31, 32, 33, 34, 34, 35, 35, 36, 37, 38, 39, 40, 41, 41, 42, 42, 43, 44, 44, 45, 46, 47, 48, 49, 50, 50, 51, 51, 52, 53, 53, 54, 55, 56, 56, 57, 58, 59 (list; graph; listen)

	OFFSET	`1,3`
	MAPLE	`H:=proc(n) option remember; if n=1 then 1 else n-H(H(H(H(H(H(n-1)))))); fi; end proc;`
	MATHEMATICA	`a[1] = 1; a[n_] := a[n] = n - a[a[a[a[a[a[n - 1]]]]]]; Table[ a[n], {n, 75}] (from Robert G. Wilson v Dec 16 2004)`
	CROSSREFS	`Cf. A005206, A005374, A005375, A005376.` `Sequence in context: A114955 A060207 A134679 this_sequence A095703 A101041 A093697` `Adjacent sequences: A100718 A100719 A100720 this_sequence A100722 A100723 A100724`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), Dec 12 2004`

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Last modified November 29 12:46 EST 2009. Contains 167659 sequences.

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