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Search: id:A125819
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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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+0
2
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| 0, 1, 2, 101, 396, 10589, 59590, 1146313, 8072856, 127338073, 1037743178, 14427279437, 129515647140, 1658477399669, 15879972571918, 192632252911729, 1925621845299504
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OFFSET
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1,3
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FORMULA
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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
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Expand[Table[((1 + 7Sqrt[2])^n - (1 - 7Sqrt[2])^n)/(14Sqrt[2]), {n, 0, 30}]] (*Artur Jasinski*)
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CROSSREFS
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Cf. A125820.
Adjacent sequences: A125816 A125817 A125818 this_sequence A125820 A125821 A125822
Sequence in context: A042249 A064152 A088272 this_sequence A072383 A035325 A028989
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KEYWORD
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nonn
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AUTHOR
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Artur Jasinski (grafix(AT)csl.pl), Dec 10 200, corrected Jan 12 2007
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