login
Largest prime < 10*a(n-1), a(1)=17.
2

%I #11 Jan 15 2025 12:15:27

%S 17,167,1669,16673,166723,1667227,16672267,166722667,1667226667,

%T 16672266659,166722666527,1667226665213,16672266652081,

%U 166722666520801,1667226665207989,16672266652079879,166722666520798747,1667226665207987467,16672266652079874607,166722666520798746053

%N Largest prime < 10*a(n-1), a(1)=17.

%H Harvey P. Dale, <a href="/A124299/b124299.txt">Table of n, a(n) for n = 1..300</a>

%t NestList[NextPrime[10#,-1]&,17,20] (* _Harvey P. Dale_, Sep 05 2013 *)

%Y Cf. A124262.

%K nonn

%O 1,1

%A _Artur Jasinski_, Dec 16 2006