A065539 a(n) is smallest prime > 10*a(n-1), a(1) = 13.

13, 131, 1319, 13217, 132173, 1321753, 13217531, 132175313, 1321753177, 13217531771, 132175317727, 1321753177271, 13217531772769, 132175317727727, 1321753177277287, 13217531772772933, 132175317727729369

Offset: 1

Author

Robert G. Wilson v, Nov 28 2001

Keywords

• nonn

Crossrefs

Cf. A065122.

Programs

Mathematica

NextPrim[n_Integer] := Block[ {k = n + 1}, While[ !PrimeQ[k], k++ ]; Return[k]]; a[1] = 13; a[n_] := NextPrim[ 10*a[n - 1]]; Table[ a[n], {n, 1, 20} ]