Numbers k such that k! + k# - 1 is prime, where k# is the primorial function A034386(k).
A081711
Numbers k such that k! + k# - 1 is prime, where k# is the primorial function A034386(k).
Terms
- a(0) =2a(1) =3a(2) =4a(3) =5a(4) =8a(5) =17a(6) =23a(7) =26a(8) =35a(9) =47a(10) =82a(11) =100a(12) =147a(13) =183a(14) =271a(15) =492a(16) =708a(17) =1116a(18) =1538a(19) =2491a(20) =4207a(21) =4468a(22) =8147
External references
- oeis: A081711