OFFSET
1,2
EXAMPLE
4!!/3!! = 2*4/(1*3) = 8/3 = 2 + 1/(1 + 1/2), so the 4th term is 2 + 1 + 2 = 5.
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Leroy Quet, Dec 10 2000
STATUS
approved