A125830 Primes for which the level is equal to 1 in A117563.

5, 13, 23, 31, 47, 53, 73, 157, 173, 211, 233, 257, 263, 353, 373, 563, 593, 607, 619, 647, 653, 733, 947, 977, 1069, 1097, 1103, 1123, 1187, 1223, 1283, 1367, 1433, 1453, 1459, 1493, 1499, 1511, 1613, 1709, 1747, 1753, 1759, 1789, 1889, 1907, 2099, 2161

Offset

1,1

Comments

This sequence is equal to 13, 31, A006562, A117876, A118467, ..., A125623, ... Let p(n) denote the n-th prime. If 2 p(n) - p(n+1) is a prime, say p(n-i) and if p(n) has a level 1 in A117563, then we say that p(n) has level(1,i). Primes of level (1,1) form the sequence A006562. 13 and 31 have a level 1 but not sublevel i.

Links

Remi Eismann, Table of n, a(n) for n=1..10000

Crossrefs

Cf. A006562, A117876, A118467, A125623, A119402, A118464, A125576.

Sequence in context: A219546 A143988 A129806 * A049882 A108195 A074798

Adjacent sequences: A125827 A125828 A125829 * A125831 A125832 A125833

Keyword

nonn

Author

Rémi Eismann, Feb 03 2007

Status

approved