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 A164663 #8 Mar 06 2021 01:32:13
%S A164663 1,3,5,5,11,9,17,11,25,15,31,21,35,25,49,23,55,29,53,39,71,41,77,43,
%T A164663 79,47,97,53,95,73,89,63,115,51,165,73,131,77,135,71,141,103,125,105,
%U A164663 163,89,169,81,161,101,193,109,181,119,197,121,261,111,203,139,179,143,239,95
%N A164663 Row sums of triangle A164659 (denominators of coefficients from int(T(n,x),x), with T(n,x) Chebyshev polynomials of the first kind).
%C A164663 The row sums of the rational triangle A164658/A164659 give A164660/A164661.
%H A164663 <a href="/index/Ch#Cheby">Index entries for sequences related to Chebyshev polynomials.</a>
%F A164663 a(n) = Sum_{m=1..n+1} A164659(n,m), n>=0.
%Y A164663 Row sums of numerator triangle A164658 gives A164662.
%K A164663 nonn,easy
%O A164663 0,2
%A A164663 _Wolfdieter Lang_, Oct 16 2009