1,9
Table of n, a(n) for n=1..18.
Gunnar Brinkmann, Jan Goedgebeur, Jonas Hagglund and Klas Markstrom, Generation and properties of snarks, arXiv:1206.6690, 2012.
Sequence in context: A121310 A356919 A278158 * A024356 A143947 A226518
Adjacent sequences: A218877 A218878 A218879 * A218881 A218882 A218883
nonn
N. J. A. Sloane, Nov 26 2012
approved