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Search: id:A132607
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| A132607 |
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Sequence allows us to find X values of the equation: X(X + 1) - 11*Y^2 = 0. |
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+0
1
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| 0, 99, 39600, 15760899, 6272798400, 2496558002499, 993623812196400, 395459780696164899, 157391999093261433600, 62641620179337354408099, 24931207439377173792990000, 9922557919251935832255612099
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OFFSET
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0,2
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FORMULA
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a(0)=0, a(1)=99 and a(n)=398*a(n-1) - a(n-2) + 198.
a(n)=-(1/2)+(1/4)*[199-60*sqrt(11)]^n+(1/4)*[199+60*sqrt(11)]^n , with n>=0 [From Paolo P. Lava (ppl(AT)spl.at), Oct 07 2008]
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CROSSREFS
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Cf. A007654.
Sequence in context: A093233 A046173 A098609 this_sequence A093211 A010114 A015068
Adjacent sequences: A132604 A132605 A132606 this_sequence A132608 A132609 A132610
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KEYWORD
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nonn
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AUTHOR
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Mohamed Bouhamida (bhmd95(AT)yahoo.fr), Nov 14 2007
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EXTENSIONS
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More terms from Paolo P. Lava (ppl(AT)spl.at), Oct 07 2008
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