OFFSET
1,2
LINKS
Michael De Vlieger, Table of n, a(n) for n = 1..555
Elżbieta Liszewska, Wojciech Młotkowski, Some relatives of the Catalan sequence, arXiv:1907.10725 [math.CO], 2019.
FORMULA
a(n) = 8^(n-1)*A045755(n)/n!, A045755(n)=(8*n-7)!^8 := product(8*j-7, j=1..n); G.f. (-1+(1-64*x)^(-1/8))/8.
D-finite with recurrence: n*a(n) +8*(-8*n+7)*a(n-1)=0. - R. J. Mathar, Jan 28 2020
MATHEMATICA
Rest@ CoefficientList[Series[(-1 + (1 - 64*x)^(-1/8))/8, {x, 0, 14}], x] (* Michael De Vlieger, Oct 13 2019 *)
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
STATUS
approved