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A024056 a(n) = 5^n - n^7. 4
1, 4, -103, -2062, -15759, -75000, -264311, -745418, -1706527, -2829844, -234375, 29340954, 208308817, 1157954608, 5998102121, 30346718750, 152319455169, 762529114452, 3814085045593, 19072592456386 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..500

FORMULA

From Chai Wah Wu, Jan 26 2020: (Start)

a(n) = 13*a(n-1) - 68*a(n-2) + 196*a(n-3) - 350*a(n-4) + 406*a(n-5) - 308*a(n-6) + 148*a(n-7) - 41*a(n-8) + 5*a(n-9) for n > 8.

G.f.: (-6*x^8 - 591*x^7 - 5863*x^6 - 10833*x^5 - 3609*x^4 + 647*x^3 + 87*x^2 + 9*x - 1)/((x - 1)^8*(5*x - 1)). (End)

PROG

(MAGMA) [5^n-n^7: n in [0..30]]; // Vincenzo Librandi, Jul 03 2011

CROSSREFS

Sequence in context: A211047 A326087 A091330 * A300976 A102439 A331456

Adjacent sequences:  A024053 A024054 A024055 * A024057 A024058 A024059

KEYWORD

sign,easy

AUTHOR

N. J. A. Sloane

STATUS

approved

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Last modified October 16 17:39 EDT 2021. Contains 348042 sequences. (Running on oeis4.)