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Search: id:A154517
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| 10, 38, 84, 148, 230, 330, 448, 584, 738, 910, 1100, 1308, 1534, 1778, 2040, 2320, 2618, 2934, 3268, 3620, 3990, 4378, 4784, 5208, 5650, 6110, 6588, 7084, 7598, 8130, 8680, 9248, 9834, 10438, 11060, 11700, 12358, 13034, 13728, 14440
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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=a(n); X=648n^2+72n+1 [A154515], or, X=648n^2-72n+1 [A154514]; Y=216n-12 [A154518], or, Y=216n+12 [A154519]
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FORMULA
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a(n)=9n^2+n
a(n) = A016766(n)+n. [From Omar E. Pol (info(AT)polprimos.com), Jan 18 2009]
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EXAMPLE
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For n=1, a(1)=10; n=10, a(10)=910
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CROSSREFS
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Cf. A154518, A154519, A154511, A154514, A154510, A154515, A154516
Cf. A000290, A016766. [From Omar E. Pol (info(AT)polprimos.com), Jan 18 2009]
Sequence in context: A129426 A065009 A031430 this_sequence A034859 A136840 A027982
Adjacent sequences: A154514 A154515 A154516 this_sequence A154518 A154519 A154520
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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 11 2009
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