id:A046184 - OEIS Search Results

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Indices of octagonal numbers which are also square.

+0
9

1, 9, 121, 1681, 23409, 326041, 4541161, 63250209, 880961761, 12270214441, 170902040409, 2380358351281, 33154114877521, 461777249934009, 6431727384198601, 89582406128846401, 1247721958419651009 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`a(n)=(A001835(n))^2. - Lekraj Beedassy (blekraj(AT)yahoo.com), Jul 21 2006`
	LINKS	`Eric Weisstein's World of Mathematics, Link to a section of The World of Mathematics.`
	FORMULA	`Nearest integer to 1/6 * (2+sqrt(3))^(2n-1). - Ralf Stephan, Feb 24 2004`
	CROSSREFS	`Cf. A028230, A036428.` `a(n) = A045899(n-1) + 1 = A051047(n+1) + 1 = A003697(2n-2).` `Sequence in context: A017102 A103930 A138978 this_sequence A084769 A050353 A112941` `Adjacent sequences: A046181 A046182 A046183 this_sequence A046185 A046186 A046187`
	KEYWORD	`nonn`
	AUTHOR	`Eric Weisstein (eric(AT)weisstein.com)`

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Last modified July 19 08:04 EDT 2008. Contains 142098 sequences.

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