OFFSET
0,2
COMMENTS
In Glaisher (1907) alpha(m) is defined in section 63 on page 37. This is A225543 with signs omitted. - Michael Somos, Apr 24 2014
REFERENCES
J. W. L. Glaisher, On the representation of a number as sum of 2, 4, 6, 8, 10, and 12 squares, Quart. J. Pure and Appl. Math. 38 (1907), 1-62 (see p. 56).
N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
FORMULA
a(n) = |A225543(n)|. - Michael Somos, May 17 2013
MATHEMATICA
QP = QPochhammer; s = (QP[q^2]^6/(QP[q]*QP[q^4]^2))^4 + O[q]^50; Abs[ CoefficientList[s, q]] (* Jean-François Alcover, Nov 30 2015, adapted from PARI *)
PROG
(PARI)
N = 66; q = 'q + O('q^N);
sgf = (eta(q^2)^6/(eta(q)*eta(q^4)^2))^4
v = abs( Vec(sgf) )
\\ Joerg Arndt, May 17 2013
CROSSREFS
KEYWORD
nonn
AUTHOR
EXTENSIONS
More terms from Joerg Arndt, May 17 2013
STATUS
approved