A126036 a(n) is the largest prime < 8*a(n-1) for n > 1, with a(1) = 2.

2, 13, 103, 823, 6581, 52639, 421103, 3368809, 26950453, 215603623, 1724828887, 13798631089, 110389048703, 883112389613, 7064899116901, 56519192935207, 452153543481457, 3617228347851583, 28937826782812601, 231502614262500793, 1852020914100006319, 14816167312800050537

Offset: 1

Author

Artur Jasinski, Dec 16 2006

Keywords

• nonn

Links

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

Crossrefs

Cf. A126031.

Programs

Mathematica

Nest[Append[#,NextPrime[8Last[#],-1]]&,{2}, 21] (* James C. McMahon, Dec 31 2024 *)