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A050919
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a(n) = n*7^n + 1.
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3
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1, 8, 99, 1030, 9605, 84036, 705895, 5764802, 46118409, 363182464, 2824752491, 21750594174, 166095446413, 1259557135292, 9495123019887, 71213422649146, 531726889113617, 3954718737782520, 29311444762388083, 216579008522089718
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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.: -(42*x^2 - 7*x + 1)/((x-1)*(7*x-1)^2). [Colin Barker, Oct 14 2012]
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MATHEMATICA
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Table[n*7^n+1, {n, 0, 20}] (* or *) LinearRecurrence[{15, -63, 49}, {1, 8, 99}, 20] (* Harvey P. Dale, Nov 23 2013 *)
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PROG
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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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