A097617 8-digit primes formed by concatenating the first decimal digits of {2^n, ..., 9^n} with the n's given by A097616.

23456789, 21443183, 21442591, 19351159, 31126343, 24541211, 18181117, 31136533, 81711361, 28441117, 11352151, 53311211, 23831321, 38123257, 26641313, 88617157, 71517241, 11262533, 91911691, 21442381, 13174321

Offset

1,1

Comments

The sequence contains exactly 1127 distinct primes as proved by Eising et al., 2015.

Links

Rick L. Shepherd, Table of n, a(n) for n = 1..10000

J. Eising, D. Radcliffe, and J. Top. A Simple Answer to Gelfand’s Question. American Mathematical Monthly 122:3 (2015), 234-245.

Eric Weisstein's World of Mathematics, Gelfand's Question

Crossrefs

Cf. A097616.

Sequence in context: A105238 A252396 A236366 * A160402 A243364 A104951

Adjacent sequences: A097614 A097615 A097616 * A097618 A097619 A097620

Keyword

nonn,base

Author

Eric W. Weisstein, Aug 16 2004

Status

approved