Smallest prime p such that n divides one of f(p)-1, f(p) or f(p)+1, where f(p) is product of primes <= p, or 0 if no such p exists.
A013586
Smallest prime p such that n divides one of f(p)-1, f(p) or f(p)+1, where f(p) is product of primes <= p, or 0 if no such p exists.
Terms
- a(0) =2a(1) =2a(2) =2a(3) =0a(4) =3a(5) =3a(6) =3a(7) =0a(8) =0a(9) =5a(10) =7a(11) =0a(12) =13a(13) =7a(14) =5a(15) =0a(16) =17a(17) =0a(18) =7a(19) =0a(20) =7a(21) =11a(22) =23a(23) =0a(24) =0a(25) =13a(26) =0a(27) =0a(28) =5a(29) =5
External references
- oeis: A013586