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A155195
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a(n)=6*a(n-1)+a(n-2), n>2 ; a(0)=1, a(1)=5, a(2)=30 .
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2
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1, 5, 30, 185, 1140, 7025, 43290, 266765, 1643880, 10130045, 62424150, 384674945, 2370473820, 14607517865, 90015581010, 554701003925, 3418221604560, 21064030631285, 129802405392270, 799878462984905, 4929073183301700
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OFFSET
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0,2
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LINKS
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FORMULA
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G.f.: (1-x-x^2)/(1-6*x-x^2).
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MATHEMATICA
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LinearRecurrence[{6, 1}, {1, 5, 30}, 25] (* Paolo Xausa, Jan 19 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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