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Search: id:A154295
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| 26, 17, 170, 485, 962, 1601, 2402, 3365, 4490, 5577, 7226, 8837, 10610, 12545, 14642, 16901, 19322, 21905, 24650, 27557, 30626, 33857, 37250, 40805, 44522, 48401, 52442, 56645, 61010, 65537, 70226, 75077, 80090, 85265, 90602, 96101, 101762
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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 X=a(n), A=9n^2-10n+3 [A154262], or, A=9n^2-8n+2 [A154254], Y=27n+12 [A154266], or, Y=27n+15 [A154267]
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FORMULA
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a(n)=81n^2-90n+26
a(n)=A002522(|9n-5|). [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jan 07 2009]
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EXAMPLE
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a(0)=26, a(1)=17, a(2)=170
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CROSSREFS
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Cf. A154277, A154294, A154262, A154254, A154266, A154267
Sequence in context: A064267 A131083 A040652 this_sequence A072360 A093538 A022982
Adjacent sequences: A154292 A154293 A154294 this_sequence A154296 A154297 A154298
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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 06 2009
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