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.

Sequence in context: A095448 A105298 A003853 this_sequence A105301 A104300 A095450

Adjacent sequences: A003843 A003844 A003845 this_sequence A003847 A003848 A003849

nonn,easy

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