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 A075925 #10 Dec 27 2017 01:34:40 %S A075925 1,147,13034,907578,54807627,3016638009,155726334148,7676501248416, %T A075925 365698066506773,16976491006185711,772549060467762942, %U A075925 34614587429584922214,1532054031119984651839,67151990527665760714053 %N A075925 Sixth column of triangle A075502. %C A075925 The e.g.f. given below is Sum_{m=0..5} A075513(6,m)*exp(7*(m+1)*x)/5!. %F A075925 a(n) = A075502(n+6, 6) = (7^n)*S2(n+6, 6) with S2(n, m) := A008277(n, m) (Stirling2). %F A075925 a(n) = Sum_{m=0..5} A075513(6, m)*((m+1)*7)^n/5!. %F A075925 G.f.: 1/Product_{k=1..6} (1 - 7*k*x). %F A075925 E.g.f.: (d^6/dx^6)(((exp(7*x)-1)/7)^6)/6! = (-exp(7*x) + 160*exp(14*x) - 2430*exp(21*x) + 10240*exp(28*x) - 15625*exp(35*x) + 7776*exp(42*x))/5!. %t A075925 CoefficientList[Series[1/Product[1-7k x,{k,6}],{x,0,20}],x] (* _Harvey P. Dale_, May 25 2012 *) %Y A075925 Cf. A075924, A076002. %K A075925 nonn,easy %O A075925 0,2 %A A075925 _Wolfdieter Lang_, Oct 02 2002