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 A060335 #7 Dec 27 2021 23:45:55 %S A060335 1,28,1610,211820,64144675,44218682312,68501035223124, %T A060335 235728863806525320,1784437537982029455525,29470895991194487015464740, %U A060335 1054563682428338672254476697886,81276604641664521211218527866093204 %N A060335 Number of n-node labeled acyclic digraphs with 3 out-points. %D A060335 R. W. Robinson, Counting labeled acyclic digraphs, pp. 239-273 of F. Harary, editor, New Directions in the Theory of Graphs. Academic Press, NY, 1973. %H A060335 Andrew Howroyd, <a href="/A060335/b060335.txt">Table of n, a(n) for n = 3..50</a> %o A060335 (PARI) \\ requires A058876. %o A060335 my(T=A058876(20)); vector(#T-2, n, T[n+2][3]) \\ _Andrew Howroyd_, Dec 27 2021 %Y A060335 A diagonal of A058876. %Y A060335 Cf. A003025, A003026. %K A060335 nonn %O A060335 3,2 %A A060335 _Vladeta Jovovic_, Apr 10 2001