A054381 Number of n-node connected planar graphs with minimum degree at least 2.

0, 0, 1, 3, 10, 49, 332, 3178, 39267, 578786, 9502259

Offset

1,4

Links

Table of n, a(n) for n=1..11.

Simon Caron-Huot, Frank Coronado, and Beatrix Mühlmann, Determinants in self-dual N=4 SYM and twistor space, arXiv:2304.12341 [hep-th], 2023. See p. 23.

Eric Weisstein's World of Mathematics, Planar connected graph.

Formula

Inverse Euler transform of A049370. - Falk Hüffner, May 12 2019

Crossrefs

Cf. A002218, A010355, A049370.

Sequence in context: A143921 A082426 A359459 * A102088 A297295 A088142

Adjacent sequences: A054378 A054379 A054380 * A054382 A054383 A054384

Keyword

nonn,more,hard

Author

Eric W. Weisstein

Extensions

a(8)-a(11) from formula by Falk Hüffner, May 12 2019

Status

approved