A333276 a(n) = Sum_k k*A333274(n,k).

12, 50, 152, 346, 732, 1294, 2232, 3546, 5428, 7806, 11136, 15226, 20676, 27150, 35048, 44386, 56044, 69302, 85480, 103882, 125180, 148942, 176968, 208034, 243772, 283014, 327272, 375826, 431212, 490918, 558456, 631978, 712844, 799726, 895152, 997322, 1110628

Offset: 1

Author

Scott R. Shannon and N. J. A. Sloane, Mar 15 2020

Keywords

• nonn

Comments

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

Links

• Lars Blomberg, Table of n, a(n) for n = 1..100
• Scott R. Shannon, Images of vertices for n=1.
• Scott R. Shannon, Images of vertices for n=2.
• Scott R. Shannon, Images of vertices for n=3.
• Scott R. Shannon, Images of vertices for n=4.
• Scott R. Shannon, Images of vertices for n=9.
• Scott R. Shannon, Images of vertices for n=14.

Crossrefs

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

Extensions

a(15) and beyond from Lars Blomberg, Jun 17 2020