A126034 a(n) is largest prime < 6*a(n-1) for n > 1 with a(1) = 2.

2, 11, 61, 359, 2153, 12917, 77491, 464941, 2789629, 16737761, 100426553, 602559311, 3615355859, 21692135119, 130152810703, 780916864207, 4685501185193, 28113007111153, 168678042666907, 1012068256001351, 6072409536008087, 36434457216048503, 218606743296291011

Offset: 1

Author

Artur Jasinski, Dec 16 2006

Keywords

• nonn

Links

• Georg Fischer, Table of n, a(n) for n = 1..100 [first 39 terms from Artur Jasinski]

Crossrefs

Cf. A124190(4*a(n-1)), A126031(3), A126033(5), A126035(7), A126036(8), A126037(9), A126039(11), A126040(12).

Programs

Mathematica

Nest[Append[#,NextPrime[6Last[#], -1]]&,{2},22] (* James C. McMahon, Dec 24 2024 *)