%I #5 Mar 31 2012 10:33:03
%S 3,4,7,6,7,8,11,11,11,12,12,14,15,15,17
%N Number of letters in n-th prime (in Latin)
%H Arndt Bruenner, <a href="http://www.arndt-bruenner.de/mathe/scripts/numeraliatab.htm">Table of Latin numerals</a>
%e a(1) = 3, because the first prime number is 2 and it contains 3 letters in Latin.
%K hard,nonn,word
%O 1,1
%A _Ivan Panchenko_, Nov 22 2009