OFFSET
1,2
COMMENTS
Numbers k such that for every prime factor p of k we have gpf(2*k+p) = p, gpf = A006530.
Numbers k such that for every prime factor p of k, 2*k+p is p-smooth.
EXAMPLE
See A354532.
PROG
(PARI) lista(nn, {lim=256}, {lim_p=1<<32}) = for(n=1, nn, if(isA354531(n, lim, lim_p), print1(2^n-1, ", "))) \\ See A354531 for the function isA354531
CROSSREFS
KEYWORD
nonn,hard,more
AUTHOR
Jianing Song, Aug 17 2022
STATUS
approved