OFFSET
1,2
LINKS
W. Lang, On generalizations of Stirling number triangles, J. Integer Seqs., Vol. 3 (2000), #00.2.4.
FORMULA
G.f. (1-(1-16*x)^(1/4))/(5*(1-16*x)^(1/4)-1).
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
STATUS
approved