2,1

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

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.

Adjacent sequences: A003932 A003933 A003934 this_sequence A003936 A003937 A003938

Sequence in context: A094232 A132185 A003942 this_sequence A008872 A008871 A008915

nonn,easy

njas