Primes p such that tau(p - 1) = tau(p - 2) + 1, where tau(k) is the number of divisors of k (A000005).

A347078

Primes p such that tau(p - 1) = tau(p - 2) + 1, where tau(k) is the number of divisors of k (A000005).

Terms

    a(0) =3a(1) =5a(2) =11a(3) =17a(4) =197a(5) =257a(6) =59051a(7) =65537a(8) =149771a(9) =178931a(10) =227531a(11) =363611a(12) =3017171a(13) =4782971a(14) =5456897a(15) =7935491a(16) =10093331a(17) =15046643a(18) =15896171a(19) =20493731a(20) =26224643a(21) =27709697a(22) =28558337a(23) =29986577a(24) =51451931a(25) =55591937a(26) =71014331a(27) =72641531a(28) =83119691a(29) =87441203

External references