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A272131
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a(n) = 384*n^3 - 1184*n^2 + 1228*n - 427.
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3
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-427, 1, 365, 2969, 10117, 24113, 47261, 81865, 130229, 194657, 277453, 380921, 507365, 659089, 838397, 1047593, 1288981, 1564865, 1877549, 2229337, 2622533, 3059441, 3542365, 4073609, 4655477, 5290273, 5980301, 6727865, 7535269, 8404817, 9338813, 10339561
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OFFSET
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0,1
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LINKS
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FORMULA
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O.g.f.: (-427 + 1709*x - 2201*x^2 + 3223*x^3)/(1-x)^4.
E.g.f.: (-427 + 428*x - 32*x^2 + 384*x^3)*exp(x).
a(n) = 4*a(n-1) - 6*a(n-2) + 4*a(n-3) - a(n-4) for n>3.
See page 7 in Brent's paper:
A272132(n) = (2*n-1)^2*a(n) - 4*(n-1)^2*a(n-1).
n*a(n) = 1 + 3^7*(n-1)/(n+1) + 5^7*((n-1)*(n-2))/((n+1)*(n+2)) + ... for n >= 1. See A245244. - Peter Bala, Jan 19 2019
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MAPLE
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MATHEMATICA
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Table[384 n^3 - 1184 n^2 + 1228 n - 427, {n, 0, 40}]
LinearRecurrence[{4, -6, 4, -1}, {-427, 1, 365, 2969}, 40] (* Harvey P. Dale, Aug 24 2024 *)
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PROG
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(Magma) [384*n^3 - 1184*n^2 + 1228*n - 427: n in [0..50]];
(PARI) lista(nn) = for(n=0, nn, print1(384*n^3-1184*n^2+1228*n-427, ", ")); \\ Altug Alkan, Apr 26 2016
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CROSSREFS
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KEYWORD
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sign,easy,changed
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AUTHOR
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STATUS
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approved
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