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Search: id:A158539
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| 110, 473, 1078, 1925, 3014, 4345, 5918, 7733, 9790, 12089, 14630, 17413, 20438, 23705, 27214, 30965, 34958, 39193, 43670, 48389, 53350, 58553, 63998, 69685, 75614, 81785, 88198, 94853, 101750, 108889, 116270, 123893, 131758, 139865
(list; graph; listen)
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OFFSET
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1,1
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LINKS
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Vincenzo Librandi, X^2-AY^2=1
Wolfram MathWorld, Pell Equation
Edward Everett Withford, Pell Equation
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FORMULA
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a(n)=121*n^2-11 (n>0)
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EXAMPLE
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For n=1, a(1)=110; n=2, a(2)=473; n=3, a(3)=1078
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CROSSREFS
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Cf. A005843, A158540
Sequence in context: A120727 A134213 A028995 this_sequence A063668 A156852 A074240
Adjacent sequences: A158536 A158537 A158538 this_sequence A158540 A158541 A158542
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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 21 2009
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EXTENSIONS
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Edited by N. J. A. Sloane, Oct 12 2009
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