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A049365
Number of connected planar graphs with n nodes and even degrees (i.e., that are Eulerian).
1
1, 0, 1, 1, 3, 7, 21, 81, 401, 2499, 18604, 158515, 1464681, 14305475
OFFSET
1,5
COMMENTS
M. Kirchweger, M. Scheucher, and S. Szeider, SAT-Based Generation of Planar Graphs, in preparation.
CROSSREFS
Inverse Euler transform of A049339.
Sequence in context: A075212 A319123 A173794 * A288849 A031885 A259202
KEYWORD
nonn,nice,more,hard
AUTHOR
EXTENSIONS
a(12) from Sean A. Irvine, Jul 30 2021
a(13)-a(14) from Manfred Scheucher, Mar 11 2023
STATUS
approved