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A001593
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a(n) = 5^n + n^5.
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9
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1, 6, 57, 368, 1649, 6250, 23401, 94932, 423393, 2012174, 9865625, 48989176, 244389457, 1221074418, 6104053449, 30518337500, 152588939201, 762940872982, 3814699155193, 19073488804224, 95367434840625, 476837162287226, 2384185796169257, 11920928961514468
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OFFSET
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0,2
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COMMENTS
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a(24) is prime; a(1036) and a(104824) are probable primes (3-PRP). - David Radcliffe, Dec 23 2016
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LINKS
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FORMULA
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G.f.: (4*x^6+135*x^5+289*x^4+84*x^3-36*x^2+5*x-1) / ((x-1)^6*(5*x-1)). - Colin Barker, May 07 2013
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MAPLE
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MATHEMATICA
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LinearRecurrence[{11, -45, 95, -115, 81, -31, 5}, {1, 6, 57, 368, 1649, 6250, 23401}, 30] (* Harvey P. Dale, Jan 15 2018 *)
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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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EXTENSIONS
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STATUS
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approved
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