A131604 Primes of the form r(r(r(r(r(r(r(k)+1)+1)+1)+1)+1)+1)+1, where r(k) = A141468(k) = k-th nonprime.

2, 67, 71, 151, 157, 199, 257, 263, 277, 281, 311, 359, 373, 401, 461, 467, 499, 503, 521, 523, 541, 563, 571, 577, 613, 641, 661, 673, 677, 733, 739, 743, 761, 809, 829, 859, 863, 911, 929, 941, 967, 983, 991, 1019, 1031, 1051, 1063, 1093, 1103, 1123

Offset: 1

Author

Juri-Stepan Gerasimov, Aug 25 2008

Keywords

• nonn
• less

Examples

			At k=3, we have
    r(r(r(r(r(r(r(3)+1)+1)+1)+1)+1)+1)+1
  = r(r(r(r(r(r(4+1)+1)+1)+1)+1)+1)+1
  = r(r(r(r(r(r(5)+1)+1)+1)+1)+1)+1
  = r(r(r(r(r(8+1)+1)+1)+1)+1)+1
  = r(r(r(r(r(9)+1)+1)+1)+1)+1
  = r(r(r(r(14+1)+1)+1)+1)+1
  = r(r(r(r(15)+1)+1)+1)+1
  = r(r(r(22+1)+1)+1)+1
  = r(r(r(23)+1)+1)+1
  = r(r(33+1)+1)+1
  = r(r(34)+1)+1
  = r(48+1)+1
  = r(49)+1
  = 66+1
  = 67.
		

Crossrefs

Cf. A000040, A141468.

Extensions

211 removed, 355 replaced by 359 and extended by R. J. Mathar, Sep 05 2008