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A125174 Primes of the form n! + (n+1)! - 1. 0

%I

%S 2,7,29,839,3991679,93405311999,1394852659199,6758061133823999,

%T 315777214062132212662271999999,9146650338351415815045119999999,

%U 303916116658416027343136804044799999999

%N Primes of the form n! + (n+1)! - 1.

%e 0!+1!-1 = 1 is not prime, 1!+2!-1 = 2 is prime, 2!+3!-1 = 7 is prime, 3!+4!-1 = 29 is prime, 4!+5!-1 = 143 = 11*13 is not prime.

%o (PARI) for(n=0,35,if(isprime(a=n!+(n+1)!-1),print1(a,",")))

%Y Cf. A118913 (primes of the form n! + (n+1)! + 1).

%K nonn

%O 1,1

%A _Tomas Xordan_, Jan 12 2007

%E Edited and extended by _Klaus Brockhaus_, Jan 24 2007

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Last modified April 21 20:03 EDT 2019. Contains 322328 sequences. (Running on oeis4.)