A103886 Rearrangement of prime numbers p according to number of divisors of p-/+1.

2, 7, 13, 3, 19, 31, 5, 41, 37, 11, 103, 43, 17, 137, 61, 23, 199, 67, 29, 307, 73, 47, 349, 97, 53, 491, 101, 59, 739, 109

Offset: 1

Author

Zak Seidov, Feb 20 2005

Keywords

• nonn

Comments

Number of divisors of p-1 (less than, equals and larger than) number of divisors of p+1. A103887 - position of p(n) in the sequence.

Crossrefs

Cf. A067889, A103664, A103665, A103887.

Programs

Mathematica

Table[{A103664[[n]], A067889[[n]], A103665[[n]]}, {n, 10}]//Flatten

Formula

a(3k-2)=A103664(k); a(3k-1)=A067889(k); a(3k)=A103665(k); (k=1, 2, ...)