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 A144093 #4 Jun 02 2025 00:34:00 %S A144093 1,1,1,1,0,1,1,1,1,1,1,0,0,0,1,1,1,0,0,0,1,1,0,1,0,0,0,1,1,1,1,1,1,1, %T A144093 1,1,1,0,0,0,0,0,0,0,1,1,1,0,0,0,0,0,0,0,1,1,0,1,0,0,0,0,0,0,0,1,1,1, %U A144093 1,1,0,0,0,0,0,0,0,1,1,0,0,0,1,0,0,0,0,0,0,0,1,1,1 %N A144093 Parity array of a matrix of Hankel transforms related to C(n,floor(n/2)). %C A144093 Row sums appear to be A061338(n+1). %F A144093 T(n,k)=mod(A144092(n,k),2). %e A144093 Triangle begins %e A144093 1, %e A144093 1, 1, %e A144093 1, 0, 1, %e A144093 1, 1, 1, 1, %e A144093 1, 0, 0, 0, 1, %e A144093 1, 1, 0, 0, 0, 1, %e A144093 1, 0, 1, 0, 0, 0, 1, %e A144093 1, 1, 1, 1, 1, 1, 1, 1, %e A144093 1, 0, 0, 0, 0, 0, 0, 0, 1, %e A144093 1, 1, 0, 0, 0, 0, 0, 0, 0, 1, %e A144093 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, %e A144093 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 1, %e A144093 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, %e A144093 1, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, %e A144093 1, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, %e A144093 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, %e A144093 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 %K A144093 easy,nonn,tabl %O A144093 0,1 %A A144093 _Paul Barry_, Sep 10 2008