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A079481 Primes of the form p(n)*p(n+1)+[p(n)-1]!. 0

%I #4 Mar 31 2012 13:21:55

%S 3,5,7,13,17,71

%N Primes of the form p(n)*p(n+1)+[p(n)-1]!.

%e Let p(n) be 5, therefore p(n+1)=7 and p(n)*p(n+1)=35. [p(n)-1)]!=4!=24. 35+24=59, which is prime.

%o (PARI) forprime (p=3,1000,if (isprime(p*nextprime(p+1)+(p-1)!),print1(p",")))

%K nonn

%O 1,1

%A _Jon Perry_, Jan 16 2003

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Last modified April 25 03:15 EDT 2024. Contains 371964 sequences. (Running on oeis4.)