OFFSET
1,3
COMMENTS
Number of ways 3 is a product of n superparticular ratios, without regard to order. A superparticular ratio is a ratio of the form (m+1)/m.
EXAMPLE
a(3) = 3 since 3 can be written as (2/1)(4/3)(9/8), (2/1)(5/4)(6/5), or (3/2)^2 (4/3) but in no other way using superparticular ratios.
CROSSREFS
KEYWORD
hard,nonn,more
AUTHOR
Keith F. Lynch, Sep 05 2024
STATUS
approved