A126033 a(n) is the largest prime < 5*a(n-1) for n > 1, with a(1) = 2.

2, 7, 31, 151, 751, 3739, 18691, 93427, 467123, 2335607, 11678021, 58390103, 291950479, 1459752391, 7298761949, 36493809683, 182469048409, 912345242041, 4561726210189, 22808631050929, 114043155254641, 570215776273147, 2851078881365711, 14255394406828543, 71276972034142687

Offset

1,1

Links

Artur Jasinski, Table of n, a(n) for n = 1..40

Mathematica

Nest[Append[#, NextPrime[5Last[#], -1]]&, {2}, 24] (* James C. McMahon, Dec 23 2024 *)

Crossrefs

Cf. A126031.

Sequence in context: A391127 A335868 A391130 * A369622 A391306 A323632

Adjacent sequences: A126030 A126031 A126032 * A126034 A126035 A126036

Keyword

nonn

Author

Artur Jasinski, Dec 16 2006

Status

approved