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3588, 15755, 27922, 40089, 52256, 64423, 76590, 88757, 100924, 113091, 125258, 137425, 149592, 161759, 173926, 186093, 198260, 210427, 222594, 234761, 246928, 259095, 271262, 283429, 295596, 307763, 319930, 332097, 344264, 356431, 368598
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OFFSET
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1,1
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COMMENTS
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The identity (279841*n^2-394634*n+139128)^2-(529*n^2-746*n+263)*(12167*n-8579)^2=1 can be written as A156844(n)^2-A156842(n)*a(n)^2=1.
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LINKS
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FORMULA
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a(n) = 2*a(n-1) -a(n-2).
G.f.: x*(3588+8579*x)/(x-1)^2.
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MATHEMATICA
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LinearRecurrence[{2, -1}, {3588, 15755}, 40]
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PROG
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(Magma) I:=[3588, 15755]; [n le 2 select I[n] else 2*Self(n-1)-Self(n-2): n in [1..50]];
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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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