OFFSET
0,3
COMMENTS
a(n) = (3n)!/6^n = A014606(n) for n<=2.
LINKS
Andrew Howroyd, Table of n, a(n) for n = 0..200
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, May 06 2010
EXTENSIONS
a(0)=1 prepended by Alois P. Heinz, Jan 21 2020
a(19)-a(20) from Alois P. Heinz, Jan 22 2020
Terms a(21) and beyond from Andrew Howroyd, May 14 2020
STATUS
approved