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 A122684 #13 Apr 07 2025 11:56:11 %S A122684 0,1,4,19,54,155,432,1252,3384,9714,26752,75836,213058,603791,1702868, %T A122684 4830747,13666890,38742120,109715858,310884129,880368618,2493252951, %U A122684 7058102770,19978082407,56531061316,159932660960,452354328946,1279190479845,3616595649500 %N A122684 Sum of all Wiener indices of "chemical" trees described by A000602(n). %C A122684 C program, see the first Bomfim link, around the function Gen() of Gang Li & Frank Ruskey. %D A122684 S. Wagner, Graph-theoretical enumeration and digital expansions: an analytic approach, Dissertation, Fakult. f. Tech. Math. u. Tech. Physik, Tech. Univ. Graz, Austria, Feb., 2006. %H A122684 W. Bomfim, <a href="https://oeis.org/w/images/7/7b/FreeWiener4_2.txt">C program</a> %H A122684 Stephan Wagner, <a href="https://www.math.tugraz.at/~wagner/avwiener.pdf">On the average Wiener index of degree-restricted trees</a> %K A122684 nonn %O A122684 1,3 %A A122684 _N. J. A. Sloane_, Sep 23 2006 %E A122684 a(11)-a(29) from _Washington Bomfim_, Feb 24 2011