id:A131093 - OEIS Search Results

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a(1)=1, a(n) = a(n-1) + sum of odd numbers which are among the first (n-1) terms of the sequence.

+0
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1, 2, 3, 7, 18, 29, 69, 178, 287, 683, 1762, 2841, 6761, 17442, 28123, 66927, 172658, 278389, 662509, 1709138, 2755767, 6558163, 16918722, 27279281, 64919121, 167478082, 270037043, 642633047, 1657862098, 2673091149 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`a(n) mod 2 = A011655(n+1);` `a(n) = a(n-1) + Sum(a(k)*(a(k) mod 2): 1<=k<n), a(1) = 1.`
	LINKS	`Eric Weisstein's World of Mathematics, Odd Number`
	CROSSREFS	`Cf. A096777, A101135.` `Sequence in context: A059801 A102226 A058334 this_sequence A002864 A005248 A032102` `Adjacent sequences: A131090 A131091 A131092 this_sequence A131094 A131095 A131096`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Jun 14 2007`

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Last modified December 21 10:15 EST 2009. Contains 171081 sequences.

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