A361118 - OEIS

%I #8 Mar 03 2023 14:09:06

%S 1,2,5,7,3,4,5,11,3,2,7,11,3,5,2,11,13,3,4,7,13,5,2,17,7,9,2,13,17,3,

%T 2,19,5,3,4,11,17,5,2,23,3,19,4,13,3,5,2,29,3,31,2,7,3,37,2,17,3,41,2,

%U 5,23,7,12,5,29,7,2,3,43,5,2,3,47,5,2,3,7,19,2

%N a(n) = gcd(A360519(n), A360519(n+1)).

%H Rémy Sigrist, <a href="/A361118/b361118.txt">Table of n, a(n) for n = 1..10000</a>

%H Rémy Sigrist, <a href="/A361118/a361118.gp.txt">PARI program</a>

%F a(n) > 1 for any n > 1.

%e a(7) = gcd(A360519(7), A360519(8)) = gcd(20, 55) = 5.

%o (PARI) See Links section.

%Y Cf. A360519.

%K nonn

%O 1,2

%A _Scott R. Shannon_, _Rémy Sigrist_ and _N. J. A. Sloane_, Mar 03 2023