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: A095464 A072288 A003854 this_sequence A095466 A115555 A095468

Adjacent sequences: A003844 A003845 A003846 this_sequence A003848 A003849 A003850

nonn,easy,bref

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