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A155459
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a(n) = 7*a(n-1)+36*a(n-2), n>2 ; a(0)=1, a(1)=1, a(2)=7 .
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0
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1, 1, 7, 85, 847, 8989, 93415, 977509, 10205503, 106628845, 1113800023, 11635238581, 121543470895, 1269672885181, 13263275148487, 138551149905925, 1447335954687007, 15119193079422349, 157938445924688695
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OFFSET
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0,3
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LINKS
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FORMULA
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G.f.: (1-6*x-36*x^2)/(1-7*x-36*x^2).
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MATHEMATICA
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LinearRecurrence[{7, 36}, {1, 1, 7}, 25] (* Paolo Xausa, Jan 29 2024 *)
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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STATUS
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approved
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