id:A053757 - OEIS Search Results

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a(n)=a(a(n-4))+a(n-a(n-4)) if n>2 otherwise a(n)=1.

+0
1

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

	OFFSET	`-1,5`
	MATHEMATICA	`a := proc(n) option remember; if n<=2 then 1 else a(a(n-4))+a(n-a(n-4)); fi; end;`
	CROSSREFS	`Cf. A004001, A005229.` `Sequence in context: A123731 A003005 A006163 this_sequence A106744 A072932 A029915` `Adjacent sequences: A053754 A053755 A053756 this_sequence A053758 A053759 A053760`
	KEYWORD	`easy,nonn`
	AUTHOR	`Henry Bottomley (se16(AT)btinternet.com), Apr 05 2000`

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Last modified December 10 00:48 EST 2009. Contains 170565 sequences.

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