a(1)=2; thereafter a(n) is the smallest prime > a(n-1) that is not a factor of any 1+A, where A is a product of one or more distinct earlier terms.
A260388
a(1)=2; thereafter a(n) is the smallest prime > a(n-1) that is not a factor of any 1+A, where A is a product of one or more distinct earlier terms.
Terms
- a(0) =2a(1) =5a(2) =7a(3) =13a(4) =17a(5) =29a(6) =53a(7) =89a(8) =199a(9) =271a(10) =349a(11) =823a(12) =1747a(13) =2251a(14) =2593a(15) =6569a(16) =7121a(17) =27479a(18) =44129a(19) =85361a(20) =115259a(21) =254731a(22) =462103a(23) =903751
External references
- oeis: A260388