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A157947
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a(n) = 98n + 1.
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2
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99, 197, 295, 393, 491, 589, 687, 785, 883, 981, 1079, 1177, 1275, 1373, 1471, 1569, 1667, 1765, 1863, 1961, 2059, 2157, 2255, 2353, 2451, 2549, 2647, 2745, 2843, 2941, 3039, 3137, 3235, 3333, 3431, 3529, 3627, 3725, 3823, 3921, 4019, 4117, 4215, 4313
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OFFSET
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1,1
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COMMENTS
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The identity (98*n+1)^2 - (49*n^2 + n)*14^2 = 1 can be written as a(n)^2 - A173141(n)*14^2 = 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:=[99, 197]; [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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