OFFSET
0,30
LINKS
CROSSREFS
Trivalent simple graphs with girth at least g: A185131 (triangle); chosen g: A002851 (g=3), A014371 (g=4), A014372 (g=5), A014374 (g=6), A014375 (g=7), A014376 (g=8), this sequence (g=9).
KEYWORD
nonn,more,hard,bref
AUTHOR
Jason Kimberley, Dec 20 2012
STATUS
approved