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 A338032 #12 Oct 09 2020 03:35:57 %S A338032 0,1,1,3,2,3,7,4,4,7,12,8,6,8,12,20,13,10,10,13,20,30,21,15,14,15,21, %T A338032 30,44,31,23,19,19,23,31,44,65,45,33,27,24,27,33,45,65,91,66,47,37,32, %U A338032 32,37,47,66,91,107,92,68,51,42,40,42,51,68,92,107 %N A338032 Addition table of A337656, read by antidiagonals. %H A338032 Peter Kagey, <a href="/A338032/b338032.txt">Table of n, a(n) for n = 1..10011</a> (first 141 antidiagonals, flattened) %e A338032 Addition table begins: %e A338032 + | 0 1 3 7 12 20 30 44 65 %e A338032 -----+----------------------------- %e A338032 0 | 0 1 3 7 12 20 30 44 65 %e A338032 1 | 1 2 4 8 13 21 31 45 66 %e A338032 3 | 3 4 6 10 15 23 33 47 68 %e A338032 7 | 7 8 10 14 19 27 37 51 72 %e A338032 12 | 12 13 15 19 24 32 42 56 77 %e A338032 20 | 20 21 23 27 32 40 50 64 85 %e A338032 30 | 30 31 33 37 42 50 60 74 95 %e A338032 44 | 44 45 47 51 56 64 74 88 109 %e A338032 65 | 65 66 68 72 77 85 95 109 130 %Y A338032 Cf. A337656, A337657, A338031 (by rows), A338034 (multiplication table). %Y A338032 Cf. A337660, A337973, A338015. %K A338032 nonn,tabl %O A338032 1,4 %A A338032 _Peter Kagey_, Oct 07 2020