%I A046519
%S A046519 7,13,103,1009,10009,100003,1000003,10000121,100000039,1000000009,
%T A046519 10000000033,100000000003,1000000000039,10000000000411,100000000000067,
%U A046519 1000000000000487,10000000000000481,100000000000000003
%N A046519 Least n-digit 'happy' prime.
%C A046519 Values found by Harvey Heinz and Jud McCranie.
%D A046519 R. K. Guy, Unsolved Problems Number Theory, Sect. E34.
%H A046519 C. Rivera, <a href="http://www.primepuzzles.net/puzzles/puzz_021.htm">
               Related puzzle page</a>
%H A046519 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               HappyNumber.html">Happy Number</a>
%Y A046519 Cf. A007770.
%Y A046519 Sequence in context: A001544 A136720 A035030 this_sequence A128351 A050946 
               A084963
%Y A046519 Adjacent sequences: A046516 A046517 A046518 this_sequence A046520 A046521 
               A046522
%K A046519 nonn,base
%O A046519 0,1
%A A046519 Patrick De Geest (pdg(AT)worldofnumbers.com), Sep 15 1998.