id:A158589 - OEIS Search Results

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a(n)=18*(18*n^2-1).

+0
2

306, 1278, 2898, 5166, 8082, 11646, 15858, 20718, 26226, 32382, 39186, 46638, 54738, 63486, 72882, 82926, 93618, 104958, 116946, 129582, 142866, 156798, 171378, 186606, 202482, 219006, 236178, 253998, 272466, 291582, 311346, 331758 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`The identity (36n^2-1)^2 - (324n^2-18)(2n)^2 = 1 can be written in` `Pell-format as (A136017(n))^2 - a(n)* (A005843(n))^2 =1.`
	LINKS	`Vincenzo Librandi, X^2-AY^2=1` `Edward Everett Withford, Pell Equation` `Wolfram MathWorld, Pell Equation`
	CROSSREFS	`Cf. A005843, A136017` `Sequence in context: A058828 A156168 A005951 this_sequence A030030 A064257 A023908` `Adjacent sequences: A158586 A158587 A158588 this_sequence A158590 A158591 A158592`
	KEYWORD	`nonn,easy`
	AUTHOR	`Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Mar 22 2009`
	EXTENSIONS	`Comment rewritten by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Oct 28 2009`

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Last modified December 2 11:54 EST 2009. Contains 167921 sequences.

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