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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
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0, 99, 39600, 15760899, 6272798400, 2496558002499, 993623812196400, 395459780696164899, 157391999093261433600, 62641620179337354408099, 24931207439377173792990000, 9922557919251935832255612099
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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FORMULA
| 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 (paoloplava(AT)gmail.com), Oct 07 2008]
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CROSSREFS
| Cf. A007654.
Sequence in context: A098609 A195623 A190921 * A093211 A010114 A015068
Adjacent sequences: A132604 A132605 A132606 * A132608 A132609 A132610
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KEYWORD
| nonn
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AUTHOR
| Mohamed Bouhamida (bhmd95(AT)yahoo.fr), Nov 14 2007
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EXTENSIONS
| More terms from Paolo P. Lava (paoloplava(AT)gmail.com), Oct 07 2008
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