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 A014726 #12 Nov 19 2018 03:11:01 %S A014726 1,1,1,1,1,1,9,9,1,1,1,1,25,25,1,1,225,225,1,1,49,441,1225,1225,441, %T A014726 49,1,1,1,1,81,81,1,1,2025,2025,1,1,121,3025,27225,27225,3025,121,1,1, %U A014726 245025,245025,1,1,169,511225,1656369,1656369 %N A014726 Squares of odd elements in Pascal triangle. %F A014726 a(n) = A014421(n)^2. - _Sean A. Irvine_, Nov 18 2018 %Y A014726 Cf. A014421. %K A014726 nonn,tabf %O A014726 0,7 %A A014726 _Mohammad K. Azarian_ %E A014726 More terms from _Sean A. Irvine_, Nov 18 2018