2,6
Table of n, a(n) for n=2..19.
Jan Goedgebeur and Patric R. J. Ostergard, Switching 3-Edge-Colorings of Cubic Graphs, arXiv:2105:01363 [math.CO], May 2021. See Table 4.
Cf. A000109.
Sequence in context: A276749 A232016 A132558 * A072113 A105433 A196086
Adjacent sequences: A358285 A358286 A358287 * A358289 A358290 A358291
nonn,more
N. J. A. Sloane, Nov 08 2022
approved