A076555 Greatest prime divisor of n-th prime + 2.

2, 5, 7, 3, 13, 5, 19, 7, 5, 31, 11, 13, 43, 5, 7, 11, 61, 7, 23, 73, 5, 3, 17, 13, 11, 103, 7, 109, 37, 23, 43, 19, 139, 47, 151, 17, 53, 11, 13, 7, 181, 61, 193, 13, 199, 67, 71, 5, 229, 11, 47, 241, 3, 23, 37, 53, 271, 13, 31, 283, 19, 59, 103, 313, 7, 29, 37, 113, 349

Offset

1,1

Comments

Greatest prime divisor of n-th prime + 1 in A023509. Greatest prime divisor of n-th prime + 3 in A023576.

Links

Harvey P. Dale, Table of n, a(n) for n = 1..1000

Mathematica

FactorInteger[#][[-1, 1]]&/@(Prime[Range[70]]+2) (* Harvey P. Dale, Sep 05 2014 *)

Crossrefs

Cf. A023509, A023576.

Sequence in context: A140263 A073929 A361329 * A095928 A100114 A078319

Adjacent sequences: A076552 A076553 A076554 * A076556 A076557 A076558

Keyword

easy,nonn

Author

Zak Seidov, Oct 19 2002

Status

approved