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 A237587 #10 Feb 17 2014 23:43:00 %S A237587 1,9,1,25,9,1,49,25,9,1,81,49,25,9,1,121,81,49,25,9,1,169,121,81,49, %T A237587 25,9,1,225,169,121,81,49,25,9,1,289,225,169,121,81,49,25,9,1,361,289, %U A237587 225,169,121,81,49,25,9,1,441,361,289,225,169,121,81,49,25,9,1 %N A237587 Triangle read by rows in which row n lists the first n odd squares in decreasing order. %C A237587 The sum of row n gives A000447(n). %C A237587 The alternatig sum of row n gives A077221(n). %F A237587 T(n,k) = (2*(n-k+1)-1)^2, n >=1, 1<=k<=n. %e A237587 Triangle begins: %e A237587 1; %e A237587 9, 1; %e A237587 25, 9, 1; %e A237587 49, 25, 9, 1; %e A237587 81, 49, 25, 9, 1; %e A237587 121, 81, 49, 25, 9, 1; %e A237587 169, 121, 81, 49, 25, 9, 1; %e A237587 225, 169, 121, 81, 49, 25, 9, 1; %e A237587 289, 225, 169, 121, 81, 49, 25, 9, 1; %e A237587 361, 289, 225, 169, 121, 81, 49, 25, 9, 1; %e A237587 ... %Y A237587 Cf. A000290, A000447, A016754, A055461, A077221. %K A237587 nonn,tabl %O A237587 1,2 %A A237587 _Omar E. Pol_, Feb 16 2014