a(n) is the least prime of class n-, according to the Erdos-Selfridge classification of primes.
2, 11, 23, 47, 283, 719, 1439, 2879, 34549, 138197, 1266767, 14920303, 36449279
2 seqfan posts
Sat May 29 00:10:58 CEST 2010 [seqfan] Re: Primes by rank