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A193430 Primes p such that p+1 is in A055462. 1

%I

%S 23,6911,5944066965503999

%N Primes p such that p+1 is in A055462.

%C Prime numbers that are one less than the product of first n superfactorials.

%C The next term, if it exists, has more than 75,000 digits.

%C Subsequence of A238265.

%F a(n) are the prime values of 1! * (1! * 2!) * (1! * 2! * 3!) * (1! * 2! * 3! * ... * n!) - 1

%e 23 is a term because 23 = 1! * (1! * 2!) * (1! * 2! * 3!) - 1.

%o (PARI) t=1;k=1;for(n=2,100,t*=n!;k*=t;if(ispseudoprime(k-1),print1(k-1", "))) \\ _Charles R Greathouse IV_, Jul 28 2011

%Y Cf. A005462, A000040.

%K nonn,bref,hard

%O 1,1

%A _Kausthub Gudipati_, Jul 28 2011

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Last modified August 4 01:48 EDT 2021. Contains 346441 sequences. (Running on oeis4.)