OFFSET
1,1
COMMENTS
A positive integer p is in this list iff it can be written as p = Product_{i = 1..k} (3 + 1/t_i) with a positive integer k and integers t_i >= 2.
The sequence does not contain multiples of 3, see comments in A355627.
LINKS
Markus Sigg, Table of n, a(n) for n = 1..13637
EXAMPLE
10 = (3 + 1/4) * (3 + 1/13). 100 = (3 + 1/2) * (3 + 1/7) * (3 + 1/34) * (3 + 1/1133). 280 = (3 + 1/4) * (3 + 1/7) * (3 + 1/22) * (3 + 1/2614) * (3 + 1/6831253).
PROG
(PARI) See A355626.
CROSSREFS
KEYWORD
nonn
AUTHOR
Markus Sigg, Jul 15 2022
STATUS
approved