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Search: id:A154359
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| 99, 649, 3699, 9249, 17299, 27849, 40899, 56449, 74499, 95049, 118099, 143649, 171699, 202249, 235299, 270849, 308899, 349449, 392499, 438049, 486099, 536649, 589699, 645249, 703299, 763849, 826899, 892449, 960499, 1031049
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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, with X=a(n); A=25n^2-14n+2 [A154356], 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^2-700n+99
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EXAMPLE
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For n=(0), a(0)=99; n=1, a(1)=649; n=2, a(2)=3699
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CROSSREFS
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Cf. A154359, A154360, A154361, A154355, A154357
Adjacent sequences: A154356 A154357 A154358 this_sequence A154360 A154361 A154362
Sequence in context: A008882 A027579 A157659 this_sequence A061366 A135219 A093299
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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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