A046848 Primes of form k*2^k+(k-1).

2, 67, 389, 32212254749, 584115552289, 1861861819085211933448282832989, 22747455000408352326750293979672813380881340606518608030931171147991

Offset: 1

Author

Felice Russo

Keywords

• nonn

Comments

The next term has 341 digits. - Harvey P. Dale, Apr 15 2017

Links

• Amiram Eldar, Table of n, a(n) for n = 1..9

Crossrefs

Cf. A046849, A069229.

Programs

Mathematica

Select[Table[n 2^n+n-1,{n,300}],PrimeQ] (* Harvey P. Dale, Apr 15 2017 *)

Formula

a(n) = A069229(A046849(n)) - 1. - Amiram Eldar, Jul 27 2025