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A157961
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a(n) = 242*n - 1.
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2
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241, 483, 725, 967, 1209, 1451, 1693, 1935, 2177, 2419, 2661, 2903, 3145, 3387, 3629, 3871, 4113, 4355, 4597, 4839, 5081, 5323, 5565, 5807, 6049, 6291, 6533, 6775, 7017, 7259, 7501, 7743, 7985, 8227, 8469, 8711, 8953, 9195, 9437, 9679, 9921, 10163
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OFFSET
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1,1
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COMMENTS
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The identity (242*n - 1)^2 - (121*n^2 - n)*22^2 = 1 can be written as a(n)^2 - A157960(n)*22^2 = 1. - Vincenzo Librandi, Feb 10 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:=[241, 483]; [n le 2 select I[n] else 2*Self(n-1)-Self(n-2): n in [1..50]]; // Vincenzo Librandi, Feb 10 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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