A333277 - OEIS

%I #20 Jan 01 2024 22:47:02

%S 4,30,116,290,652,1186,2092,3370,5212,7546,10828,14866,20260,26674,

%T 34508,43778,55364,68546,84644,102962,124172,147842,175772,206738,

%U 242372,281506,325652,374090,429356,488938,556348,629738,710468,797210,892492,994514,1107668

%N a(n) = Sum_k k*A333275(n,k).

%C a(n)/A331755(n) is the average number of polygons touching a non-boundary vertex in the graph defined in A306302.

%H Lars Blomberg, <a href="/A333277/b333277.txt">Table of n, a(n) for n = 1..100</a>

%Y Cf. A159065, A306302, A333274, A333275, A333276.

%K nonn

%O 1,1

%A _Scott R. Shannon_ and _N. J. A. Sloane_, Mar 15 2020

%E a(6) and beyond from _Lars Blomberg_, Jun 17 2020