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A024082 7^n-n^7. 8
1, 6, -79, -1844, -13983, -61318, -162287, 0, 3667649, 35570638, 272475249, 1957839572, 13805455393, 96826261890, 678117659345, 4747390650568, 33232662134145, 232630103648534, 1628412985690417, 11398894291501404, 79792265017612001, 558545862282195466 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

a(20)=79792265017612001 and a(24)=191581231375979942977 are primes, thus terms of A123206. - M. F. Hasler, Aug 20 2014

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..200

FORMULA

G.f.: (1-9*x-85*x^2-407*x^3+5991*x^4+15665*x^5+8245*x^6+831*x^7+8*x^8)/((1-7*x)*(1-x)^8). - Bruno Berselli, May 16 2011

MATHEMATICA

Table[7^n - n^7, {n, 0, 25}] (* Stefan Steinerberger, Apr 08 2006 *)

PROG

(MAGMA) [7^n-n^7: n in [0..25]]; // Vincenzo Librandi, May 16 2011

CROSSREFS

Cf. A024012, A024026, A058794, A024040, A024054, A024068.

Sequence in context: A184553 A129524 A131237 * A132547 A248530 A229574

Adjacent sequences:  A024079 A024080 A024081 * A024083 A024084 A024085

KEYWORD

sign

AUTHOR

N. J. A. Sloane.

EXTENSIONS

More terms from Stefan Steinerberger, Apr 08 2006

STATUS

approved

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Last modified December 7 04:21 EST 2021. Contains 349567 sequences. (Running on oeis4.)