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 A259970 #15 Jan 08 2021 07:44:38 %S A259970 1,0,1,1,3,3,6,28,42,21,91,510,1050,945,315,2820,18631,48360,61845, %T A259970 39060,9765,177661,1351413,4220433,6942915,6357015,3075975,615195 %N A259970 Triangle read by rows: coefficients eta(n,k) arising from the study of completely transitive graphs on n nodes. %H A259970 E. Andresen, K. Kjeldsen, <a href="http://dx.doi.org/10.1016/0012-365X(76)90054-6">On certain subgraphs of a complete transitively directed graph</a>, Discrete Math. 14 (1976), no. 2, 103-119. %H A259970 Hsien-Kuei Hwang, Emma Yu Jin, Michael J. Schlosser, <a href="https://arxiv.org/abs/2012.13570">Asymptotics and statistics on Fishburn Matrices: dimension distribution and a conjecture of Stoimenow</a>, arXiv:2012.13570 [math.CO], Dec 25 2020, p. 29. %e A259970 Triangle begins: %e A259970 1, %e A259970 0,1, %e A259970 1,3,3, %e A259970 6,28,42,21, %e A259970 91,510,1050,945,315, %e A259970 2820,18631,48360,61845,39060,9765, %e A259970 177661,1351413,4220433,6942915,6357015,3075975,615195, %e A259970 ... %Y A259970 Cf. A259971, A259972. %Y A259970 Diagonals include A005327, A005328, A005329. %Y A259970 Row sums are A005014. %K A259970 nonn,more,tabl %O A259970 1,5 %A A259970 _N. J. A. Sloane_, Jul 11 2015