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A338440
a(n) is the greatest common divisor of A338338(n), A338338(n+1) and A338338(n+2).
2
1, 2, 1, 3, 1, 1, 5, 2, 1, 1, 7, 2, 1, 3, 5, 2, 1, 1, 11, 2, 1, 3, 7, 2, 1, 3, 1, 11, 5, 2, 1, 13, 1, 3, 4, 1, 1, 17, 2, 1, 19, 1, 3, 5, 2, 7, 3, 1, 17, 5, 2, 1, 23, 1, 3, 2, 11, 1, 7, 5, 3, 1, 2, 13, 3, 1, 1, 5, 13, 2, 1, 29, 1, 3, 10, 1, 1, 31, 2, 1, 1, 37
OFFSET
1,2
COMMENTS
No prime factor of a(n) divides A338338(n+3).
LINKS
FORMULA
gcd(a(n), A338338(n+3)) = 1.
EXAMPLE
a(4) = gcd(A338338(4), A338338(5), A338338(6)) = gcd(6, 3, 9) = 3.
PROG
(C) // See Links section.
CROSSREFS
Cf. A338338.
Sequence in context: A160183 A168534 A026807 * A179045 A106740 A178534
KEYWORD
nonn
AUTHOR
Rémy Sigrist, Oct 28 2020
STATUS
approved