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 A333277 #20 Jan 01 2024 22:47:02 %S A333277 4,30,116,290,652,1186,2092,3370,5212,7546,10828,14866,20260,26674, %T A333277 34508,43778,55364,68546,84644,102962,124172,147842,175772,206738, %U A333277 242372,281506,325652,374090,429356,488938,556348,629738,710468,797210,892492,994514,1107668 %N A333277 a(n) = Sum_k k*A333275(n,k). %C A333277 a(n)/A331755(n) is the average number of polygons touching a non-boundary vertex in the graph defined in A306302. %H A333277 Lars Blomberg, <a href="/A333277/b333277.txt">Table of n, a(n) for n = 1..100</a> %Y A333277 Cf. A159065, A306302, A333274, A333275, A333276. %K A333277 nonn %O A333277 1,1 %A A333277 _Scott R. Shannon_ and _N. J. A. Sloane_, Mar 15 2020 %E A333277 a(6) and beyond from _Lars Blomberg_, Jun 17 2020