A024086 - OEIS

%I #15 Sep 08 2022 08:44:48

%S 1,6,-1999,-176804,-4191903,-48811318,-362679407,-1976503200,

%T -8584169791,-31340706002,-99717524751,-283334343868,-729167083487,

%U -1695271383630,-3371342096815,-3902194349432,15640744525185

%N a(n) = 7^n - n^11.

%H Vincenzo Librandi, <a href="/A024086/b024086.txt">Table of n, a(n) for n = 0..400</a>

%H G. Villemin's Almanach of Numbers, <a href="http://villemin.gerard.free.fr/aNombre/TYPDENOM/Pomeranc.htm">Convenience store number</a>

%F E.g.f.: exp(7*x) - exp(x)*x*(1 + 1023*x + 28501*x^2 + 145750*x^3 + 246730*x^4 + 179487*x^5 + 63987*x^6 + 11880*x^7 + 1155*x^8 + 55*x^9 + x^10). - _Stefano Spezia_, Aug 16 2019

%o (Magma) [7^n-n^11: n in [0..20]]; // _Vincenzo Librandi_, Jul 04 2011

%K sign,easy

%O 0,2

%A _N. J. A. Sloane_