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A049367 Number of triangle-free planar graphs with n nodes. 0
1, 2, 3, 7, 14, 37, 102, 367, 1532, 8091, 50775, 372417, 3045985, 26989204, 252934543 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
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
KEYWORD
nonn,nice,hard,more
AUTHOR
EXTENSIONS
a(12)-a(15) added using tinygraph by Falk Hüffner, May 09 2019
STATUS
approved

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Last modified June 20 08:48 EDT 2024. Contains 373515 sequences. (Running on oeis4.)