OFFSET
0,2
FORMULA
a(n) = 2^n*A108735(n). - Zak Seidov, Jun 24 2005
D-finite with recurrence: n*a(n) +12*(2*n-3)*a(n-1)=0. - R. J. Mathar, Jan 20 2020
From Amiram Eldar, May 28 2022: (Start)
Sum_{n>=0} 1/a(n) = (672 - 72*arcsinh(1/(2*sqrt(6)))/5)/625.
Sum_{n>=0} 1/a(n) = (480 - 72*arcsin(1/(2*sqrt(6)))/sqrt(23))/529. (End)
MATHEMATICA
CoefficientList[Series[(1 + 24 x)^(1/2), {x, 0, 20}], x] (* Vincenzo Librandi, Jan 21 2020 *)
CROSSREFS
KEYWORD
sign
AUTHOR
N. J. A. Sloane, Jun 22 2005
STATUS
approved