2,1

J. H. Conway, R. T. Curtis, S. P. Norton, R. A. Parker and R. A. Wilson, ATLAS of Finite Groups. Oxford Univ. Press, 1985, p. xvi.

H. S. M. Coxeter and W. O. J. Moser, Generators and Relations for Discrete Groups, 4th ed., Springer-Verlag, NY, reprinted 1984, p. 131.

Sequence in context: A083216 A145065 A080127 this_sequence A003934 A038362 A038363

Adjacent sequences: A003938 A003939 A003940 this_sequence A003942 A003943 A003944

nonn,easy

N. J. A. Sloane (njas(AT)research.att.com).