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A123656
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a(n) = 1 + n^4 + n^6.
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6
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3, 81, 811, 4353, 16251, 47953, 120051, 266241, 538003, 1010001, 1786203, 3006721, 4855371, 7567953, 11441251, 16842753, 24221091, 34117201, 47176203, 64160001, 85960603, 113614161, 148315731, 191434753, 244531251, 309372753, 387951931
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OFFSET
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1,1
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LINKS
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FORMULA
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a(n) = 1 + n^4 + n^6.
G.f.: x*(3 +60*x +307*x^2 +272*x^3 +81*x^4 -4*x^5 +x^6)/(1-x)^7. - Colin Barker, May 25 2012
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MATHEMATICA
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Table[1 + n^4 + n^6, {n, 1, 50}] (* G. C. Greubel, Oct 17 2017 *)
LinearRecurrence[{7, -21, 35, -35, 21, -7, 1}, {3, 81, 811, 4353, 16251, 47953, 120051}, 30] (* Harvey P. Dale, May 10 2020 *)
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PROG
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(Magma) [1 + n^4 + n^6: n in [1..25]]; // G. C. Greubel, Oct 17 2017
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CROSSREFS
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KEYWORD
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easy,nonn
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AUTHOR
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STATUS
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approved
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