0,2

w is uniquely defined as the largest value such that for all n>0, a(n) is prime. - Charles R Greathouse IV Oct 25 2006

Hardy's paper uses this as an example, although the sequence is not well-defined there. The next term is probably 2^16382-35411, a 4932-digit prp. - Charles R Greathouse IV Oct 25 2006

P. Ribenboim, Prime number records, Two-Year College Math. Jnl., 25 (1994), pp. 280-290.

E. M. Wright, A prime-representing function, American Mathematical Monthly, 58 (1951), pp. 616-618.

a(0) = 1, a(n) = the greatest prime less than 2^(a(n-1)+1). - Charles R Greathouse IV Oct 25 2006

Cf. A086238.

Sequence in context: A119987 A127855 A087333 this_sequence A112856 A007523 A092830

Adjacent sequences: A016101 A016102 A016103 this_sequence A016105 A016106 A016107

nonn

Robert G. Wilson v (rgwv(AT)rgwv.com)