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A125819
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a(n)=((1 + 7Sqrt[2])^n - (1 - 7Sqrt[2])^n)/(14Sqrt[2]).
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1
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0, 1, 2, 101, 396, 10589, 59590, 1146313, 8072856, 127338073, 1037743178, 14427279437, 129515647140, 1658477399669, 15879972571918, 192632252911729, 1925621845299504
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,3
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FORMULA
| a(0)=0, a(1)=1, a(n)=2*a(n-1)+97*a(n-2) for n>=2 . G.f.: x/(1-2*x-97*x^2) . - Philippe DELEHAM (kolotoko(AT)wanadoo.fr), Dec 12 2006
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MATHEMATICA
| Expand[Table[((1 + 7Sqrt[2])^n - (1 - 7Sqrt[2])^n)/(14Sqrt[2]), {n, 0, 30}]] (*Artur Jasinski*)
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CROSSREFS
| Cf. A125820.
Sequence in context: A064152 A162353 A088272 * A179998 A072383 A035325
Adjacent sequences: A125816 A125817 A125818 * A125820 A125821 A125822
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KEYWORD
| nonn
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AUTHOR
| Artur Jasinski (grafix(AT)csl.pl), Dec 10 200, corrected Jan 12 2007
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