A049368 Number of connected triangle-free planar graphs with n nodes.

1, 1, 1, 3, 6, 18, 55, 230, 1063, 6161, 41004, 312782, 2618995, 23549346, 222764216

Offset: 1

Author

Brendan McKay

Keywords

• nonn
• nice
• hard

Links

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

Extensions

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