OFFSET
1,11
COMMENTS
MAPLE
For n = 22 the a(22) = 2 solutions are:
22 * 24 * 33 = 132^2, and
22 * 27 * 32 * 33 = 792^2.
Note that 22 * 24 * 25 * 33 = 660^2 is not a solution because the subsequence [25] has a square product.
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Peter Kagey, Aug 29 2017
STATUS
approved