A333277 a(n) = Sum_k k*A333275(n,k).

4, 30, 116, 290, 652, 1186, 2092, 3370, 5212, 7546, 10828, 14866, 20260, 26674, 34508, 43778, 55364, 68546, 84644, 102962, 124172, 147842, 175772, 206738, 242372, 281506, 325652, 374090, 429356, 488938, 556348, 629738, 710468, 797210, 892492, 994514, 1107668

Offset

1,1

Comments

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

Links

Lars Blomberg, Table of n, a(n) for n = 1..100

Crossrefs

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

Sequence in context: A211628 A166761 A213824 * A027445 A027789 A130424

Adjacent sequences: A333274 A333275 A333276 * A333278 A333279 A333280

Keyword

nonn

Author

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

Extensions

a(6) and beyond from Lars Blomberg, Jun 17 2020

Status

approved