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A173275
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a(n) = 169*n^2 + n.
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2
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170, 678, 1524, 2708, 4230, 6090, 8288, 10824, 13698, 16910, 20460, 24348, 28574, 33138, 38040, 43280, 48858, 54774, 61028, 67620, 74550, 81818, 89424, 97368, 105650, 114270, 123228, 132524, 142158, 152130, 162440, 173088, 184074, 195398, 207060, 219060, 231398, 244074, 257088, 270440, 284130, 298158, 312524
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OFFSET
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1,1
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COMMENTS
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The identity (338*n + 1)^2 - (169*n^2 + n)*26^2 = 1 can be written as A158000(n)^2 - a(n)*26^2 = 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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LinearRecurrence[{3, -3, 1}, {170, 678, 1524}, 50] (* Vincenzo Librandi, Feb 10 2012 *)
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PROG
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(Magma)[169*n^2+n: 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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