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Search: id:A154254
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| 2, 3, 22, 59, 114, 187, 278, 387, 514, 659, 822, 1003, 1202, 1419, 1654, 1907, 2178, 2467, 2774, 3099, 3442, 3803, 4182, 4579, 4994, 5427, 5878, 6347, 6834, 7339, 7862, 8403, 8962, 9539, 10134, 10747, 11378, 12027, 12694, 13379, 14082, 14803, 15542
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OFFSET
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1,1
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COMMENT
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Pell's equation X^2-AY^2=1, with a(n)=A, X=9*a(n)-1 and Y^2=81*a(n)-18
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FORMULA
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a(n)=9n^2-8n+2
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EXAMPLE
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For n=0, a(0)=2; n=2, a(2)=22
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CROSSREFS
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Cf. A154253
Sequence in context: A032810 A062921 A083178 this_sequence A166122 A114996 A153256
Adjacent sequences: A154251 A154252 A154253 this_sequence A154255 A154256 A154257
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KEYWORD
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nonn
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AUTHOR
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Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Jan 05 2009
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EXTENSIONS
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7662 replaced by 7862 - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jan 07 2009
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