A049367 Number of triangle-free planar graphs with n nodes.

1, 2, 3, 7, 14, 37, 102, 367, 1532, 8091, 50775, 372417, 3045985, 26989204, 252934543

Offset

1,2

Links

Table of n, a(n) for n=1..15.

F. Hüffner, tinygraph, software for generating integer sequences based on graph properties, version 9766535.

Crossrefs

Cf. A049368 (inverse Euler transform), A006785.

Sequence in context: A246747 A090828 A296416 * A089790 A296417 A296418

Adjacent sequences: A049364 A049365 A049366 * A049368 A049369 A049370

Keyword

nonn,nice,hard,more

Author

Brendan McKay

Extensions

a(12)-a(15) added using tinygraph by Falk Hüffner, May 09 2019

Status

approved