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 A308181 #7 Jun 01 2019 13:49:21 %S A308181 0,1,3,2,2,0,5,4,1,4,1,3,6,3,0,5,8,7,5,2,7,5,2,1,3,11,10,9,0,6,9,6,8, %T A308181 4,5,7,10,8,12,3,7,4,12,11,4,7,0,2,8,13,9,7,11,1,6,10,15,14,10,12,2,8, %U A308181 9,6,14,12,11,6,4,0,3,5,16,13,6,15,8,3,1,10 %N A308181 Triangle in A274650 read by upwards antidiagonals. %H A308181 Rémy Sigrist, <a href="/A308181/b308181.txt">Table of n, a(n) for n = 0..10200</a> %H A308181 Rémy Sigrist, <a href="/A308181/a308181.gp.txt">PARI program for A308181</a> %o A308181 (PARI) See Links section %Y A308181 Cf. A274650, A286294. %K A308181 nonn %O A308181 0,3 %A A308181 _N. J. A. Sloane_, May 30 2019 %E A308181 More terms from _Rémy Sigrist_, Jun 01 2019