OFFSET
1,2
EXAMPLE
as a(3) = 8 choose a(4) = 3 ( smallest number not occurring earlier) and a(5) = 9 to satisfy the requirement. The product of three terms starting with a(3) is 8*3*9 = 216 = 6^3.
CROSSREFS
KEYWORD
nonn
AUTHOR
Amarnath Murthy, Apr 10 2003
EXTENSIONS
Corrected and extended by David Wasserman, Aug 26 2004
STATUS
approved