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A124085 Least k such that k*p(n)!/p(n)# +1 is prime starting with n=3,(p(i)=i-th prime). 0

%I #4 Mar 31 2012 13:22:05

%S 1,3,6,2,2,9,4,2,6,22,15,3,5,19,31,31,36,2,15,26,7,3,70,22,21,52,9,96,

%T 115,49,21,8,12,110,20,5,55,55,29,34,71,194,63,94,92,105,20,5,58,4,

%U 241,34

%N Least k such that k*p(n)!/p(n)# +1 is prime starting with n=3,(p(i)=i-th prime).

%e 3*2*3*4*5*6*7/(2*3*5*7) +1 = 73 prime so k(4)=3 as p(4)=7

%K nonn

%O 3,2

%A _Pierre CAMI_, Nov 25 2006

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Last modified March 28 04:05 EDT 2024. Contains 371235 sequences. (Running on oeis4.)