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Search: id:A157475
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| 528, 1040, 1552, 2064, 2576, 3088, 3600, 4112, 4624, 5136, 5648, 6160, 6672, 7184, 7696, 8208, 8720, 9232, 9744, 10256, 10768, 11280, 11792, 12304, 12816, 13328, 13840, 14352, 14864, 15376, 15888, 16400, 16912, 17424, 17936, 18448, 18960
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OFFSET
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1,1
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COMMENT
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If A=[A157474] 16*n.^2+n (17,66,147,260,.,); Y=[A157475] 512*n+16 (528,1040,1552,2064..,); X=[A157476] 2048*n^2+128*n+1 (2177,8449,18817,.,) ; , we have for all terms, Pell's equation X^2-A*Y^2=1. Example: 2177^2-17*528^2=1; 8449^2-66*1040^2=1; 18817^2-147*1552^2=1.
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LINKS
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Vincenzo Librandi, X^2-AY^2=1
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FORMULA
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a(n)=512*n+16 (n>0)
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EXAMPLE
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For n=1, a(1)=528; n=2, a(2)=1040; n=3, a(3)=1552
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CROSSREFS
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Cf. A157474, A157476
Sequence in context: A153660 A158364 A085329 this_sequence A158365 A076580 A037944
Adjacent sequences: A157472 A157473 A157474 this_sequence A157476 A157477 A157478
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KEYWORD
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nonn
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AUTHOR
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Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Mar 01 2009
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