OFFSET
1,3
COMMENTS
The prime divisors of a(n) are forbidden in A090252(n).
LINKS
Michael De Vlieger, Table of n, a(n) for n = 1..587
Rémy Sigrist, Representation of the prime divisors of a(n) (blue pixels) and A090252(n) (red pixels)
Rémy Sigrist, PARI program
FORMULA
gcd(a(n), A090252(n)) = 1.
MATHEMATICA
With[{s = Import["https://oeis.org/A090252/b090252.txt", "Data"][[1 ;; 25, -1]]}, Table[Product[s[[k]], {k, Ceiling[n/2], n - 1}], {n, Length[s]}]] (* Michael De Vlieger, Aug 28 2022 *)
PROG
(PARI) See Links section.
CROSSREFS
KEYWORD
nonn
AUTHOR
Rémy Sigrist, Jun 06 2022
STATUS
approved