OFFSET
1,2
LINKS
Ed Pegg, Jr., Illustrations of polyforms
Eric Weisstein's World of Mathematics, Polyedge
CROSSREFS
KEYWORD
nonn,hard,more
AUTHOR
Ed Pegg Jr, May 13 2009
EXTENSIONS
a(9) and a(10) from Joseph Myers, Oct 05 2011
a(11)-a(13) from Aaron N. Siegel, May 23 2022
STATUS
approved