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A024093 a(n) = 8^n - n^5. 2
1, 7, 32, 269, 3072, 29643, 254368, 2080345, 16744448, 134158679, 1073641824, 8589773541, 68719227904, 549755442595, 4398045973280, 35184371329457, 281474975662080, 2251799812265391, 18014398507592416 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..400

FORMULA

From Chai Wah Wu, Jul 10 2016: (Start)

a(n) = 14*a(n-1) - 63*a(n-2) + 140*a(n-3) - 175*a(n-4) + 126*a(n-5) - 49*a(n-6) + 8*a(n-7) for n > 6.

G.f.: (-9*x^6 - 201*x^5 - 517*x^4 - 122*x^3 + 3*x^2 + 7*x - 1)/((x - 1)^6*(8*x - 1)). (End)

PROG

(MAGMA) [8^n-n^5: n in [0..20]]; // Vincenzo Librandi, Jul 05 2011

CROSSREFS

Sequence in context: A188331 A177766 A240390 * A110323 A288721 A324412

Adjacent sequences:  A024090 A024091 A024092 * A024094 A024095 A024096

KEYWORD

nonn

AUTHOR

N. J. A. Sloane

STATUS

approved

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Last modified April 19 11:58 EDT 2021. Contains 343114 sequences. (Running on oeis4.)