Corrected On sequence nXn where x equal 09,18,27,36,45,54,63,72,81,90

[Richard Guy]

These will form an AP with common diff 90 or 900 or
9000 or  ..., one member of which will be divisible by 7.  R.

On Mon, 23 Feb 2004, Karima MOUSSAOUI wrote:

> Dear Seqfna,
> Can anyone find n such that n09n, n18n,n27n,n36n,n45n,n54n,n63n,n72n,n81n,n90n, are all primes
> where n09n designe concatenation of (n 09 n) (example 1091 is prime, 310931 is prime)
> Thanks
> M.Bouayoun