OFFSET
0,3
COMMENTS
Let a(0) = 0, a(1) = 1 and a(n) = 2*m*a(n-1)/(n-1) + k^2*a(n-2) for n > 1.
Then G.f. is x/(2*m) * d/dx ((1 + k*x)/(1 - k*x))^(m/k).
LINKS
Seiichi Manyama, Table of n, a(n) for n = 0..1000
FORMULA
a(n) = n*A303537(n)/2.
G.f.: x/(1-4*x)^2 * ((1-4*x)/(1+4*x))^(3/4).
CROSSREFS
KEYWORD
nonn
AUTHOR
Seiichi Manyama, May 21 2018
STATUS
approved