Triangular array read by rows: T(n,k) is the least prime factor of n!*k + 1, n >= 1, 1 <= k <= n.

Terms

a(0) =2a(1) =3a(2) =5a(3) =7a(4) =13a(5) =19a(6) =5a(7) =7a(8) =73a(9) =97a(10) =11a(11) =241a(12) =19a(13) =13a(14) =601a(15) =7a(16) =11a(17) =2161a(18) =43a(19) =13a(20) =29a(21) =71a(22) =17a(23) =15121a(24) =20161a(25) =11a(26) =30241a(27) =35281a(28) =61a(29) =11