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: A008870 A008869 A095474 this_sequence A003937 A120335 A095476

Adjacent sequences: A003941 A003942 A003943 this_sequence A003945 A003946 A003947

nonn,easy,bref

njas