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 A056591 #8 Jul 24 2018 21:24:19 %S A056591 1,12,166,1784,17840,163504,1418549,11751784,94002810,730859800, %T A056591 5554472496,41437244784,304478259625,2209596042260,15871463933950, %U A056591 113044318064744,799558820643440,5622796403700080,39354459839661725 %N A056591 Fifth column sequence of triangle A056588. %H A056591 Robert Israel, <a href="/A056591/b056591.txt">Table of n, a(n) for n = 0..1193</a> %F A056591 a(n)= A056588(n+4, 4), n >= 0. %F A056591 a(n)=5^(n+5)-3^(n+5)*F(n+6)-Fibonomial(n+6, 2)*2^(n+5)+Fibonomial(n+6, 3)+Fibonomial(n+6, 4); F(n)=A000045(n) (Fibonacci); Fibonomial(n, m) := A010048(n, m). %F A056591 G.f.: (72*x^9-142*x^8+276*x^7+473*x^6-112*x^5-78*x^3+46*x^2-8*x+1)/((1-x)*(1+2*x)*(1-5*x)*(1+x-x^2)*(1+3*x+x^2)*(1-3*x-9*x^2)*(1-4*x-x^2)*(1-6*x+4*x^2) *(1-7*x+x^2)). %p A056591 g:= (72*x^9-142*x^8+276*x^7+473*x^6-112*x^5-78*x^3+46*x^2-8*x+1)/((1-x)*(1+2*x)*(1-5*x)*(1+x-x^2)*(1+3*x+x^2)*(1-3*x-9*x^2)*(1-4*x-x^2)*(1-6*x+4*x^2) *(1-7*x+x^2)): %p A056591 S:= series(g,x,21): %p A056591 seq(coeff(S,x,i),i=0..20); # _Robert Israel_, Jul 24 2018 %Y A056591 Cf. A000045, A056588, A010048, A000012, A000071, A056589, A056590. %K A056591 nonn,easy %O A056591 0,2 %A A056591 _Wolfdieter Lang_ Jul 10 2000