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%I #7 Mar 14 2020 15:29:20
%S 2333,3313,3323,3331,3343,3373,3433,3533,3733,3833,5333,7333,10333,
%T 13033,13313,13331,13337,13339,13633,13933,16333,17333,19333,20333,
%U 23339,23633,23833,29333,30133,30313,30323,31033,31337,31393,32233,32303,32323
%N Primes with exactly three 3's.
%H Daniel Starodubtsev, <a href="/A178552/b178552.txt">Table of n, a(n) for n = 1..10000</a>
%Y Cf. A038618, A178550, A178551, A178553-A178558.
%K nonn,base
%O 1,1
%A _Lekraj Beedassy_, May 29 2010
%E Missing a(26) = 23633 and a(27) = 23833 inserted by _Daniel Starodubtsev_, Mar 14 2020