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A158136
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a(n) = 144*n - 1.
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2
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143, 287, 431, 575, 719, 863, 1007, 1151, 1295, 1439, 1583, 1727, 1871, 2015, 2159, 2303, 2447, 2591, 2735, 2879, 3023, 3167, 3311, 3455, 3599, 3743, 3887, 4031, 4175, 4319, 4463, 4607, 4751, 4895, 5039, 5183, 5327, 5471, 5615, 5759, 5903, 6047, 6191
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OFFSET
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1,1
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COMMENTS
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The identity (144*n - 1)^2 - (144*n^2 - 2*n)*12^2 = 1 can be written as a(n)^2 - A158135(n)*12^2 = 1. - Vincenzo Librandi, Feb 11 2012
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LINKS
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FORMULA
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MATHEMATICA
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PROG
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(Magma) I:=[143, 287]; [n le 2 select I[n] else 2*Self(n-1)-Self(n-2): n in [1..50]]; // Vincenzo Librandi, Feb 11 2012
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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STATUS
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approved
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