0,2

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.

B. Runge, On Siegel modular forms I, J. Reine Angew. Math., 436 (1993), 57-85.

T. D. Noe, Table of n, a(n) for n=0..20

for m from 0 to 50 do N:=2^(m^2)*mul( 4^i-1, i=1..m); lprint(N); od:

A bisection of A003053.

Sequence in context: A112637 A014525 A100732 this_sequence A002204 A052295 A080369

Adjacent sequences: A003920 A003921 A003922 this_sequence A003924 A003925 A003926

nonn,easy,nice

N. J. A. Sloane (njas(AT)research.att.com). Edited by N. J. A. Sloane (njas(AT)research.att.com), Dec 30 2008.