The n-th row of the following triangle contains n distinct primes such that the product of (n-1) of them + 2 is prime in all cases. The first (n-1) numbers are the smallest set whose product +2 is a prime and the n-th term is chosen to satisfy the requirement. a(1) = 2 by convention. Sequence contains the triangle by rows.
A083776
The n-th row of the following triangle contains n distinct primes such that the product of (n-1) of them + 2 is prime in all cases. The first (n-1) numbers are the smallest set whose product +2 is a prime and the n-th term is chosen to satisfy the requirement. a(1) = 2 by convention. Sequence contains the triangle by rows.
Terms
- a(0) =2a(1) =3a(2) =5a(3) =3a(4) =5a(5) =7a(6) =3a(7) =5a(8) =7a(9) =31a(10) =3a(11) =5a(12) =7a(13) =13a(14) =127a(15) =3a(16) =5a(17) =7a(18) =11a(19) =13a(20) =149a(21) =3a(22) =5a(23) =7a(24) =11a(25) =13a(26) =19a(27) =12653a(28) =3a(29) =5
External references
- oeis: A083776