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Search: id:A087113
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(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Except for the first term of [A002522], and [A058331] if X=[A058331], Y=[A087113], A= [A002522], we have, for all other terms, Pell's equation: [A058331]^2 - [A002522]*[A087113]^2=1; (X^2-A*Y^2=1); example: 3^2-2*2^2=1; 9^2-5*4^2=1, 129^2-65*16^2=1, and so on. [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Feb 11 2009]
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CROSSREFS
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Cf. A002522, A058331 [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Feb 11 2009]
Sequence in context: A055962 A055964 A055966 this_sequence A004275 A119432 A005843
Adjacent sequences: A087110 A087111 A087112 this_sequence A087114 A087115 A087116
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KEYWORD
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dead
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