This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A196258 #36 Oct 24 2024 02:21:16
%S A196258 1,11,242,7986,351384,19326120,1275523920,98215341840,8642950081920,
%T A196258 855652058110080,94121726392108800,11388728893445164800,
%U A196258 1503312213934761753600,214973646592670930764800,33105941575271323337779200
%N A196258 a(n) = 11^n*n!.
%H A196258 Vincenzo Librandi, <a href="/A196258/b196258.txt">Table of n, a(n) for n = 0..300</a>
%F A196258 a(n) = 11^n*n!.
%F A196258 E.g.f.: 1/(1-11*x).
%F A196258 From _Amiram Eldar_, Jun 25 2020: (Start)
%F A196258 Sum_{n>=0} 1/a(n) = e^(1/11).
%F A196258 Sum_{n>=0} (-1)^n/a(n) = e^(-1/11). (End)
%t A196258 Table[11^n n!,{n,0,20}] (* _Harvey P. Dale_, Sep 21 2015 *)
%o A196258 (Magma) [(Factorial(n)*11^n): n in [0..20]]; // _Vincenzo Librandi_, Oct 28 2011
%o A196258 (PARI) a(n)=11^n*n! \\ _Charles R Greathouse IV_, Nov 22 2011
%Y A196258 Cf. A000142, A000165, A032031, A047053, A052562, A047058, A051188, A051189, A051232, A051262, A145448.
%K A196258 nonn,easy,less
%O A196258 0,2
%A A196258 _Philippe Deléham_, Oct 27 2011