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 A210858 #7 Mar 30 2012 18:58:17 %S A210858 1,1,1,1,3,2,1,6,8,3,1,10,24,20,5,1,15,59,82,45,8,1,21,125,271,251,98, %T A210858 13,1,28,237,765,1073,701,204,21,1,36,413,1898,3860,3802,1842,414,34, %U A210858 1,45,674,4235,12115,17011,12325,4589,820,55,1,55,1044,8662 %N A210858 Triangle of coefficients of polynomials u(n,x) jointly generated with A210859; see the Formula section. %C A210858 Row n starts with 1 and ends with F(n), where F=A000045 (Fibonacci numbers). %C A210858 Alternating row sums: 1,0,0,0,0,0,0,0,... %C A210858 For a discussion and guide to related arrays, see A208510. %F A210858 u(n,x)=u(n-1,x)+x*v(n-1,x), %F A210858 v(n,x)=(x+n)*u(n-1,x)+x*v(n-1,x), %F A210858 where u(1,x)=1, v(1,x)=1. %e A210858 First five rows: %e A210858 1 %e A210858 1...1 %e A210858 1...3....2 %e A210858 1...6....8....3 %e A210858 1...10...24...20...5 %e A210858 First three polynomials u(n,x): 1, 1 + x, 1 + 3x + 2x^2. %t A210858 u[1, x_] := 1; v[1, x_] := 1; z = 14; %t A210858 u[n_, x_] := u[n - 1, x] + x*v[n - 1, x]; %t A210858 v[n_, x_] := (x + n)*u[n - 1, x] + x*v[n - 1, x]; %t A210858 Table[Expand[u[n, x]], {n, 1, z/2}] %t A210858 Table[Expand[v[n, x]], {n, 1, z/2}] %t A210858 cu = Table[CoefficientList[u[n, x], x], {n, 1, z}]; %t A210858 TableForm[cu] %t A210858 Flatten[%] (* A210858 *) %t A210858 cv = Table[CoefficientList[v[n, x], x], {n, 1, z}]; %t A210858 TableForm[cv] %t A210858 Flatten[%] (* A210859 *) %Y A210858 Cf. A210806, A208510. %K A210858 nonn,tabl %O A210858 1,5 %A A210858 _Clark Kimberling_, Mar 28 2012