%I #24 Jan 01 2024 22:47:20

%S 12,50,152,346,732,1294,2232,3546,5428,7806,11136,15226,20676,27150,

%T 35048,44386,56044,69302,85480,103882,125180,148942,176968,208034,

%U 243772,283014,327272,375826,431212,490918,558456,631978,712844,799726,895152,997322,1110628

%N a(n) = Sum_k k*A333274(n,k).

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

%H Lars Blomberg, <a href="/A333276/b333276.txt">Table of n, a(n) for n = 1..100</a>

%H Scott R. Shannon, <a href="/A333276/a333276.png">Images of vertices for n=1</a>.

%H Scott R. Shannon, <a href="/A333276/a333276_1.png">Images of vertices for n=2</a>.

%H Scott R. Shannon, <a href="/A333276/a333276_2.png">Images of vertices for n=3</a>.

%H Scott R. Shannon, <a href="/A333276/a333276_3.png">Images of vertices for n=4</a>.

%H Scott R. Shannon, <a href="/A333276/a333276_4.png">Images of vertices for n=9</a>.

%H Scott R. Shannon, <a href="/A333276/a333276_5.png">Images of vertices for n=14</a>.

%Y Cf. A159065, A306302, A333274, A333275, A333277.

%K nonn

%O 1,1

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

%E a(15) and beyond from _Lars Blomberg_, Jun 17 2020