OFFSET
0,2
LINKS
Alois P. Heinz, Table of n, a(n) for n = 0..300
David Broadhurst, Relations between A241885/A242225, A222411/A222412, and A350194/A350154.
F. J. Dyson, N. E. Frankel and M. L. Glasser, Lehmer's Interesting Series, arXiv:1009.4274 [math-ph], 2010-2011.
F. J. Dyson, N. E. Frankel and M. L. Glasser, Lehmer's interesting series, Amer. Math. Monthly, 120 (2013), 116-130.
D. H. Lehmer, Interesting series involving the central binomial coefficient, Amer. Math. Monthly, 92(7) (1985), 449-457.
FORMULA
EXAMPLE
The first few fractions are 1, -1/4, -1/32, 5/384, 7/10240, -19/40960, -869/61931520, 715/49545216, ... = A222411/A222412. - Petros Hadjicostas, May 14 2020
MAPLE
gf:= (x/(exp(x)-1))^(3/2)*exp(x/2):
a:= n-> denom(coeff(series(gf, x, n+3), x, n)):
seq(a(n), n=0..25); # Alois P. Heinz, Mar 02 2013
MATHEMATICA
Series[(x/(Exp[x]-1))^(3/2)*Exp[x/2], {x, 0, 25}] // CoefficientList[#, x]& // Denominator (* Jean-François Alcover, Mar 18 2014 *)
CROSSREFS
KEYWORD
nonn,frac
AUTHOR
N. J. A. Sloane, Feb 28 2013
STATUS
approved