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 A370773 #6 Mar 02 2024 03:17:40 %S A370773 0,1,0,1,1,0,1,2,1,0,1,5,2,1,0,1,12,7,2,1,0,1,30,26,7,2,1,0,1,74,110, %T A370773 30,7,2,1,0,1,188,481,159,30,7,2,1,0,1,478,2209,940,168,30,7,2,1,0,1, %U A370773 1235,10379,6093,1104,168,30,7,2,1,0,1,3214,49868,41367,8428,1124,168,30,7,2,1,0 %N A370773 Triangle read by rows: T(n,k) is the number of k-trees with n unlabeled nodes rooted at a hedron with a designated front. %H A370773 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 A370773 Triangle begins: %e A370773 0; %e A370773 1, 0; %e A370773 1, 1, 0; %e A370773 1, 2, 1, 0; %e A370773 1, 5, 2, 1, 0; %e A370773 1, 12, 7, 2, 1, 0; %e A370773 1, 30, 26, 7, 2, 1, 0; %e A370773 1, 74, 110, 30, 7, 2, 1, 0; %e A370773 1, 188, 481, 159, 30, 7, 2, 1, 0; %e A370773 1, 478, 2209, 940, 168, 30, 7, 2, 1, 0; %e A370773 1, 1235, 10379, 6093, 1104, 168, 30, 7, 2, 1, 0; %e A370773 ... %Y A370773 Columns k=1 is A000106. %Y A370773 Cf. A370770 (unrooted), A370771, A370772. %K A370773 nonn,tabl %O A370773 0,8 %A A370773 _Andrew Howroyd_, Mar 01 2024