id:A131786 - OEIS Search Results

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Repeated terms in A131771; a(n) = A131770( (n+1)*(n+2)/2 - 1 ) for n>=0.

+0
2

1, 4, 20, 104, 592, 3592, 23212, 158652, 1141964, 8621820, 68063300, 560324488, 4799515756, 42690098440, 393605305676, 3755794383536, 37034899306132, 376877989985712, 3953002335087184, 42686126230197500, 474037727935110620 (list; graph; listen)

	OFFSET	`0,2`
	CROSSREFS	`Cf. A131770, A131771, A131785.` `Sequence in context: A104550 A089382 A026305 this_sequence A061709 A135159 A020084` `Adjacent sequences: A131783 A131784 A131785 this_sequence A131787 A131788 A131789`
	KEYWORD	`nonn`
	AUTHOR	`Paul D. Hanna (pauldhanna(AT)juno.com), Jul 15 2007`

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Last modified December 20 00:58 EST 2009. Contains 171054 sequences.

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