id:A084188 - OEIS Search Results

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a(0)=1, a(n+1) = 2*a(n) + b(n+2), where b(n)=A004539(n) is the n-th bit in the binary expansion of sqrt(2).

+0
2

1, 2, 5, 11, 22, 45, 90, 181, 362, 724, 1448, 2896, 5792, 11585, 23170, 46340, 92681, 185363, 370727, 741455, 1482910, 2965820, 5931641, 11863283, 23726566, 47453132, 94906265, 189812531, 379625062, 759250124 (list; graph; listen)

	OFFSET	`0,2`
	COMMENT	`Numerators in approximation sqrt(2) ~ a(n)/2^n.`
	CROSSREFS	`Cf. A084185, A084186.` `Sequence in context: A024493 A130781 A071015 this_sequence A044432 A033120 A091617` `Adjacent sequences: A084185 A084186 A084187 this_sequence A084189 A084190 A084191`
	KEYWORD	`nonn`
	AUTHOR	`Ralf Stephan (ralf(AT)ark.in-berlin.de), May 18 2003`

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Last modified November 30 13:13 EST 2009. Contains 167758 sequences.

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