A124084 Least k such that k*p(n)!/p(n)# -1 is prime starting with n=3,(p(i)=i-th prime).

1, 1, 3, 5, 1, 7, 2, 4, 18, 12, 15, 5, 33, 16, 7, 46, 60, 35, 1, 87, 74, 5, 3, 19, 3, 23, 17, 55, 13, 105, 19, 48, 108, 50, 7, 37, 100, 111, 23, 50, 22, 80, 7, 73, 39, 24, 74, 51, 164, 21, 125, 62

Offset

3,3

Links

Table of n, a(n) for n=3..54.

Example

3*2*3*4*5*6*7*8*9*10*11/(2*3*5*7*11) -1 = 51839 prime so k(5)=3 as p(5)=11

Crossrefs

Sequence in context: A028510 A338721 A122053 * A133045 A320051 A341489

Adjacent sequences: A124081 A124082 A124083 * A124085 A124086 A124087

Keyword

nonn

Author

Pierre CAMI, Nov 25 2006

Status

approved