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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.
Table of n, a(n) for n=1..8.
a(n) = d(A000961(n+1),4) where d(q,n) is defined in A003837. - Sean A. Irvine, Sep 17 2015
Sequence in context: A233598 A187316 A251999 * A003843 A093047 A093046
Adjacent sequences: A003847 A003848 A003849 * A003851 A003852 A003853
N. J. A. Sloane.