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 A202819 #12 Jun 16 2022 03:15:59 %S A202819 1,0,1,1,1,0,3,4,5,5,17,14,10,5,0,105,122,136,146,151,151,811,706,584, %T A202819 448,302,151,0 %N A202819 The right-hand half-triangle of A202704. %e A202819 Triangle begins: %e A202819 1; %e A202819 0, 1; %e A202819 1, 1, 0; %e A202819 3, 4, 5, 5; %e A202819 17, 14, 10, 5, 0; %e A202819 105, 122, 136, 146, 151, 151; %e A202819 811, 706, 584, 448, 302, 151, 0; %Y A202819 Cf. A202704, A202820. %K A202819 nonn,tabl,more %O A202819 1,7 %A A202819 _N. J. A. Sloane_, Dec 25 2011 %E A202819 a(22)-a(28) from _F. Chapoton_, May 24 2022