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 A210563 #5 Mar 30 2012 18:58:17 %S A210563 1,1,2,1,3,5,1,3,10,13,1,3,11,32,34,1,3,11,40,99,89,1,3,11,41,141,299, %T A210563 233,1,3,11,41,152,482,887,610,1,3,11,41,153,556,1604,2595,1597,1,3, %U A210563 11,41,153,570,1998,5217,7508,4181,1,3,11,41,153,571,2113,7042 %N A210563 Triangle of coefficients of polynomials u(n,x) jointly generated with A210564; see the Formula section. %C A210563 Last terms in rows: odd-indexed Fibonacci numbers %C A210563 Limiting row: A001835 %C A210563 For a discussion and guide to related arrays, see A208510. %F A210563 u(n,x)=x*u(n-1,x)+x*v(n-1,x)+1, %F A210563 v(n,x)=(x+1)*u(n-1,x)+2x*v(n-1,x)+1, %F A210563 where u(1,x)=1, v(1,x)=1. %e A210563 First five rows: %e A210563 1 %e A210563 1...2 %e A210563 1...3...5 %e A210563 1...3...10...13 %e A210563 1...3...11...32...34 %e A210563 First three polynomials u(n,x): 1, 1 + 2x, 1 + 3x + 5x^2. %t A210563 u[1, x_] := 1; v[1, x_] := 1; z = 16; %t A210563 u[n_, x_] := x*u[n - 1, x] + x*v[n - 1, x] + 1; %t A210563 v[n_, x_] := (x + 1)*u[n - 1, x] + 2 x*v[n - 1, x] + 1; %t A210563 Table[Expand[u[n, x]], {n, 1, z/2}] %t A210563 Table[Expand[v[n, x]], {n, 1, z/2}] %t A210563 cu = Table[CoefficientList[u[n, x], x], {n, 1, z}]; %t A210563 TableForm[cu] %t A210563 Flatten[%] (* A210563 *) %t A210563 Table[Expand[v[n, x]], {n, 1, z}] %t A210563 cv = Table[CoefficientList[v[n, x], x], {n, 1, z}]; %t A210563 TableForm[cv] %t A210563 Flatten[%] (* A210564 *) %Y A210563 Cf. A210564, A208510. %K A210563 nonn,tabl %O A210563 1,3 %A A210563 _Clark Kimberling_, Mar 23 2012