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A157325
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a(n) = 1728*n + 24.
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3
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1752, 3480, 5208, 6936, 8664, 10392, 12120, 13848, 15576, 17304, 19032, 20760, 22488, 24216, 25944, 27672, 29400, 31128, 32856, 34584, 36312, 38040, 39768, 41496, 43224, 44952, 46680, 48408, 50136, 51864, 53592, 55320, 57048, 58776
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OFFSET
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1,1
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COMMENTS
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The identity (10368*n^2 + 288*n + 1)^2 - (36*n^2 + n)*(1728*n + 24)^2 = 1 can be written as A157326(n)^2 - A157324(n)*a(n)^2 = 1 (see also second part of the comment at A157324). - Vincenzo Librandi, Jan 26 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:=[1752, 3480]; [n le 2 select I[n] else 2*Self(n-1)-Self(n-2): n in [1..40]]; // Vincenzo Librandi, Jan 26 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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