OFFSET
0,2
COMMENTS
All terms are powers of 3.
FORMULA
a(n) = 3^A004128(n).
a(n) = 3^n*a(floor(n/3)). - Vladeta Jovovic, Mar 01 2004
a(n) = denominator(binomial(1/3, n)). - Peter Luschny, Apr 07 2016
MAPLE
A067623 := n -> denom(binomial(1/3, n)):
seq(A067623(n), n=0..21); # Peter Luschny, Apr 07 2016
MATHEMATICA
Table[Denominator@ Binomial[1/3, n], {n, 0, 22}] (* Michael De Vlieger, Apr 07 2016 *)
CROSSREFS
KEYWORD
nonn,frac
AUTHOR
Benoit Cloitre, Feb 02 2002
STATUS
approved