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 A283827 #13 Jun 17 2017 02:11:34 %S A283827 0,1,1,1,1,1,2,1,2,3,1,3,7,1,3,9,10,1,4,12,30,1,4,18,38,45,1,5,21,64, %T A283827 144,1,5,27,91,217,210 %N A283827 Irregular triangle read by rows: T(n,k) = number of trees on n nodes with load k, n>=1, 1 <= k <= floor(n/2). %C A283827 The load of a tree is the maximal branch weight from the centroid. %H A283827 Peter Steinbach, <a href="/A000055/a000055_8.pdf">Field Guide to Simple Graphs, Volume 3</a>, Part 8 (For Volumes 1, 2, 3, 4 of this book see A000088, A008406, A000055, A000664, respectively.) %e A283827 Triangle begins: %e A283827 0, %e A283827 1, %e A283827 1, %e A283827 1, 1, %e A283827 1, 2, %e A283827 1, 2, 3, %e A283827 1, 3, 7, %e A283827 1, 3, 9, 10, %e A283827 1, 4, 12, 30, %e A283827 1, 4, 18, 38, 45, %e A283827 1, 5, 21, 64, 144, %e A283827 1, 5, 27, 91, 217, 210, %e A283827 ... %Y A283827 Cf. A283826. %Y A283827 See also A000676, A000677, A027416, A102911. %K A283827 nonn,tabf,more %O A283827 1,7 %A A283827 _N. J. A. Sloane_, Mar 19 2017