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A152240
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a(n)=5*a(n-1)+7*a(n-2), n>1 ; a(0)=1, a(1)=7 .
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4
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1, 7, 42, 259, 1589, 9758, 59913, 367871, 2258746, 13868827, 85155357, 522858574, 3210380369, 19711911863, 121032221898, 743144492531, 4562948015941, 28016751527422, 172024393748697, 1056239229435439, 6485366903418074
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OFFSET
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0,2
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COMMENTS
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LINKS
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FORMULA
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G.f.: (1+2*x)/(1-5*x-7*x^2).
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MATHEMATICA
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LinearRecurrence[{5, 7}, {1, 7}, 25] (* Paolo Xausa, Jan 19 2024 *)
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PROG
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CROSSREFS
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KEYWORD
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nonn,easy,less
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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