id:A105822 - OEIS Search Results

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For n > 2, a(n) > 0 not appeared previously is such that a(n-1)^2+4*a(n-2)*a(n)=d^2 is a minimal square, a(1)=1, a(2)=2.

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1, 2, 3, 5, 8, 4, 12, 7, 10, 17, 6, 11, 21, 32, 13, 19, 14, 33, 20, 28, 24, 27, 42, 40, 18, 9, 35, 44, 39, 54, 48, 22, 15, 37, 52, 89, 30, 59, 23, 36, 99, 70, 16, 86, 47, 45, 92, 65, 157, 34, 123, 135, 222, 56, 136, 82, 29, 53, 102, 155, 25, 130, 87, 43, 170, 213, 63, 150, 57 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`Is it a permutation of positive integers? Among first 2000 terms, first missing numbers are 233, 349, 394, 443, 449. The sequence depends on seed terms a(1) and a(2); if a(1) = 1, a(3) = a(2)+1. Values of d^2 in A105823. Cf. A105734.`
	CROSSREFS	`Cf. A105734, A105823.` `Adjacent sequences: A105819 A105820 A105821 this_sequence A105823 A105824 A105825` `Sequence in context: A050196 A122597 A105836 this_sequence A011158 A104647 A065115`
	KEYWORD	`nonn`
	AUTHOR	`Zak Seidov (zakseidov(AT)yahoo.com), Apr 22 2005`

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Last modified October 7 14:39 EDT 2008. Contains 144666 sequences.

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