OFFSET
1,1
LINKS
John H. Conway, Heiko Dietrich and E. A. O'Brien, Counting groups: gnus, moas and other exotica, The Mathematical Intelligencer, March 2008, Volume 30, Issue 2, pp 6-15.
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Oct 03 2008
EXTENSIONS
More terms from R. J. Mathar, Oct 04 2008
STATUS
approved