OFFSET
1,2
COMMENTS
Because A276085 is completely additive, this is a multiplicative semigroup; if m and n are in the sequence then so is m*n.
The terms should be the integers in a multiplicative subgroup of the positive rationals. Denoting the k-th prime by p_k, a set of generators for this subgroup might be the union of {20, 81} with an infinite set constituted as follows: if p_k == 3 (mod 4) then p_k * p_{k+1} is in the set, if p_k == 1 (mod 4) then p_k^3 * p_{k+1} is in the set. - Peter Munn, Jul 15 2024
LINKS
PROG
(PARI) \\ See A373137.
CROSSREFS
KEYWORD
nonn
AUTHOR
Antti Karttunen, May 26 2024
STATUS
approved