a(n) is the least k such that k*(prime(n)#)^prime(n) - 1 is prime, where prime(n)# is the n-th primorial.
A101047
a(n) is the least k such that k*(prime(n)#)^prime(n) - 1 is prime, where prime(n)# is the n-th primorial.
Terms
- a(0) =1a(1) =2a(2) =3a(3) =15a(4) =13a(5) =6a(6) =12a(7) =23a(8) =44a(9) =5a(10) =33a(11) =153a(12) =82a(13) =63a(14) =133a(15) =376a(16) =162a(17) =340a(18) =1009a(19) =30a(20) =9a(21) =12a(22) =2818a(23) =843a(24) =1343a(25) =1348a(26) =42a(27) =125a(28) =1260a(29) =2135
External references
- oeis: A101047