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 A370772 #8 Mar 02 2024 03:16:58 %S A370772 0,1,0,1,1,0,1,1,1,0,1,3,1,1,0,1,6,3,1,1,0,1,16,10,3,1,1,0,1,37,39,10, %T A370772 3,1,1,0,1,96,164,48,10,3,1,1,0,1,239,746,253,48,10,3,1,1,0,1,622, %U A370772 3474,1584,273,48,10,3,1,1,0,1,1607,16658,10500,1913,273,48,10,3,1,1,0 %N A370772 Triangle read by rows: T(n,k) is the number of k-trees with n unlabeled nodes rooted at a hedron. %C A370772 A hedron is a (k+1)-clique. %H A370772 Andrew Gainer-Dewar, <a href="https://doi.org/10.37236/2615">Gamma-Species and the Enumeration of k-Trees</a>, Electronic Journal of Combinatorics, Volume 19 (2012), #P45. %e A370772 Triangle begins: %e A370772 0; %e A370772 1, 0; %e A370772 1, 1, 0; %e A370772 1, 1, 1, 0; %e A370772 1, 3, 1, 1, 0; %e A370772 1, 6, 3, 1, 1, 0; %e A370772 1, 16, 10, 3, 1, 1, 0; %e A370772 1, 37, 39, 10, 3, 1, 1, 0; %e A370772 1, 96, 164, 48, 10, 3, 1, 1, 0; %e A370772 1, 239, 746, 253, 48, 10, 3, 1, 1, 0; %e A370772 1, 622, 3474, 1584, 273, 48, 10, 3, 1, 1, 0; %e A370772 ... %Y A370772 Columns k=1..2 are A027852, A063688(n-2). %Y A370772 Cf. A370770 (unrooted), A370771, A370773. %K A370772 nonn,tabl %O A370772 0,12 %A A370772 _Andrew Howroyd_, Mar 01 2024