A134656 Corresponding GCD values in A116894.

2, 10453, 129341, 157519, 555097, 595411, 624363411431

Offset: 1

Author

Ryan Propper, Feb 01 2008

Keywords

• hard
• more
• nonn

Crossrefs

Cf. A116894.

Programs

C

// See Links section in A116893.

PARI

for(n = 1, 10^9, my(x = gcd(n! + 1, n^n + 1)); if(x != 1 && x != 2*n + 1, print1(x, ", ")))

Formula

a(n) = gcd(A116894(n)! + 1, A116894(n)^A116894(n) + 1)

Extensions

a(6)-a(7) from Nick Hobson, Feb 20 2024