Smallest primes a(n) such that 1 + a(1), 1 + a(1) + a(1)*a(2), ..., 1 + a(1) + a(1)*a(2) + ... + a(1)*a(2)*a(3)*...*a(n) are prime numbers with a(1) = 2 and a(i) < a(i+1).
A227613
Smallest primes a(n) such that 1 + a(1), 1 + a(1) + a(1)*a(2), ..., 1 + a(1) + a(1)*a(2) + ... + a(1)*a(2)*a(3)*...*a(n) are prime numbers with a(1) = 2 and a(i) < a(i+1).
Terms
- a(0) =2a(1) =5a(2) =7a(3) =11a(4) =41a(5) =113a(6) =149a(7) =167a(8) =173a(9) =257a(10) =281a(11) =317a(12) =431a(13) =491a(14) =839a(15) =857a(16) =953a(17) =977a(18) =1031a(19) =1091a(20) =2909a(21) =3041a(22) =3191a(23) =3467a(24) =4073a(25) =4721a(26) =5381a(27) =6047a(28) =6791a(29) =7127
External references
- oeis: A227613