A308588 Number of 4-regular 3-connected planar graphs with n vertices having an Eulerian tour for which no two consecutive edges are incident with the same face.

1, 1, 1, 1, 3, 5, 17, 40, 145, 355, 1264, 3931, 12999, 44727

Offset

8,5

Comments

Polyhedra formed by knot diagrams.

Links

Table of n, a(n) for n=8..21.

Crossrefs

Cf. A007022.

Sequence in context: A148521 A303839 A148522 * A141160 A336380 A113275

Adjacent sequences: A308585 A308586 A308587 * A308589 A308590 A308591

Keyword

nonn,more

Author

Jan Kristian Haugland, Jun 09 2019

Status

approved