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Search: id:A154358
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| 649, 99, 2049, 6499, 13499, 22899, 34849, 49299, 64249, 85699, 107649, 132099, 159049, 188499, 220449, 254899, 291849, 331299, 373249, 417699, 464649, 514099, 566049, 620499, 677449, 736899, 798849, 863299
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OFFSET
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1,1
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COMMENT
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Pell's equation X^2-AY^2=1, whith X=a(n); A=25n^2-14n+2 [A154357], or, A=25n^2-36n+13 [A154355]; Y=250n-180 [A154360], or Y=250n-70 [A154361]
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FORMULA
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a(n)=1250n^2-1800n+649
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EXAMPLE
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For n=0, a(0)=649; n=1, a(1)=99; n=2 a(2)=2049
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CROSSREFS
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Cf. A154359, A154360, A154361, A154355, A154357
Sequence in context: A034619 A035755 A107551 this_sequence A114047 A157915 A158639
Adjacent sequences: A154355 A154356 A154357 this_sequence A154359 A154360 A154361
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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), Jan 08 2009
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