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 A299772 #15 Jun 07 2018 21:59:01 %S A299772 1,2,3,3,2,6,4,11,2,10,5,7,14,2,15,6,24,22,18,2,21,7,15,30,26,23,2,28, %T A299772 8,42,41,58,31,29,2,36,9,26,81,48,68,37,36,2,45,10,65,72,124,88,80,44, %U A299772 44,2,55,11,40,127,121,142,100,94,52,53,2,66,12,93,156,232,177,208,114,110,61,63,2,78 %N A299772 Triangle read by rows T(n,k) in which the partial sums of column k give the column k of triangle A180681. %e A299772 Triangle begins: %e A299772 1; %e A299772 2, 3; %e A299772 3, 2, 6; %e A299772 4, 11, 2, 10; %e A299772 5, 7, 14, 2, 15; %e A299772 6, 24, 22, 18, 2, 21; %e A299772 7, 15, 30, 26, 23, 2, 28; %e A299772 8, 42, 41, 58, 31, 29, 2, 36; %e A299772 9, 26, 81, 48, 68, 37, 36, 2, 45; %e A299772 10, 65, 72, 124, 88, 80, 44, 44, 2, 55; %e A299772 11, 40, 127, 121, 142, 100, 94, 52, 53, 2, 66; %e A299772 12, 93, 156, 232, 177, 208, 114, 110, 61, 63, 2, 78; %e A299772 ... %Y A299772 Column 1 is A000027. %Y A299772 Leading diagonal is A000217. %Y A299772 Row sums give A206440. %Y A299772 Apparently the second diagonal gives A007395. %Y A299772 Cf. A180681. %K A299772 nonn,tabl %O A299772 1,2 %A A299772 _Omar E. Pol_, Mar 20 2018