OFFSET
1,4
COMMENTS
Case k=6,i=2 of Gordon/Goellnitz/Andrews Theorem.
REFERENCES
G. E. Andrews, The Theory of Partitions, Addison-Wesley, 1976, p. 114.
FORMULA
a(n) ~ 5^(1/4) * (3 - 2*sqrt(2))^(1/4) * exp(sqrt(5*n/3)*Pi/2) / (2^(11/4) * 3^(3/4) * n^(3/4)). - Vaclav Kotesovec, May 09 2018
MATHEMATICA
nmax = 60; Rest[CoefficientList[Series[Product[(1 - x^(4*k - 2))*(1 - x^(24*k))*(1 - x^(24*k - 21))*(1 - x^(24*k - 3))/(1 - x^k), {k, 1, nmax}], {x, 0, nmax}], x]] (* Vaclav Kotesovec, May 09 2018 *)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
EXTENSIONS
Name corrected by Vaclav Kotesovec, May 09 2018
STATUS
approved