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A328323 a(n) = gcd(A328316(n),A328316(1+n)).

%I A328323 #10 Oct 14 2019 13:56:12
%S A328323 1,1,1,3,1,1,1,1,2401,861018571670257
%N A328323 a(n) = gcd(A328316(n),A328316(1+n)).
%C A328323 All terms are odd, because the parity of A328316 alternates.
%C A328323 a(10) is 208 decimal digits long, and can be found in the b-file.
%H A328323 Antti Karttunen, <a href="/A328323/b328323.txt">Table of n, a(n) for n = 0..10</a>
%F A328323 a(n) = A324198(A328316(n)) = gcd(A328316(n),A328316(1+n)).
%o A328323 (PARI)
%o A328323 A276086(n) = { my(m=1, p=2); while(n, m *= (p^(n%p)); n = n\p; p = nextprime(1+p)); (m); };
%o A328323 A328316(n) = if(!n,0,A276086(A328316(n-1)));
%o A328323 A328323(n) = gcd(A328316(n),A328316(1+n));
%o A328323 \\ Or alternatively, as:
%o A328323 A324198(n) = gcd(n, A276086(n));
%o A328323 A328323(n) = A324198(A328316(n));
%Y A328323 Cf. A276086, A324198, A328316, A328317.
%K A328323 nonn
%O A328323 0,4
%A A328323 _Antti Karttunen_, Oct 14 2019