OFFSET
3,6
PROG
(nauty) geng -ctfq $n | countg -qg6 --ng # Martin Fuller, May 03 2015
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Keith Briggs, May 05 2007
EXTENSIONS
Corrected and extended by Martin Fuller, May 01 2015
a(18)-a(20) added by Georg Grasegger, May 02 2023
STATUS
approved