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Search: id:A145205
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| A145205 |
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Numbers X such that (X^2-67)/201 is a square |
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+0
1
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| 4154, 4279405106, 4408600346145986, 4541695990591853912234, 4678809792543413381498198474, 4820063060175757335495037232017826, 4965580763957784639661088992670945968466
(list; graph; listen)
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OFFSET
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1,1
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FORMULA
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a(n+2)=1030190*a(n+1)-a(n)
a(n)=2077*{[515095+124*sqrt(17255649)]^n+[515095-124*sqrt(17255649)]^n}-(1/2)*sqrt(17255649)*{[515095-124 *sqrt(17255649)]^n-[515095+124*sqrt(17255649)]^n}, with n>=0 [From Paolo P. Lava (ppl(AT)spl.at), Nov 25 2008]
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EXAMPLE
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The first relation is : 4154^2=201*293^2+67
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CROSSREFS
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Sequence in context: A072896 A052464 A161752 this_sequence A104824 A043627 A104918
Adjacent sequences: A145202 A145203 A145204 this_sequence A145206 A145207 A145208
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KEYWORD
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easy,nonn
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AUTHOR
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Richard Choulet (richardchoulet(AT)yahoo.fr), Oct 04 2008
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