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%I #10 Jul 13 2013 12:03:10
%S 2,3,5,7,10,13,14,15,17,19,21,22,30,37,41,42,53,54,55,58,62,67,70,73,
%T 78,81,85,86,89,90,97,101,103,107,111,115,117,122,131,137,139,141,143,
%U 149,150,159,163,165,166,169,170,177,193,197,199,211,214,215,218
%N Numbers having a unique representation as concatenation of primes in binary.
%C A090418(a(n)) = 1; subsequence of A090421.
%H Reinhard Zumkeller, <a href="/A090420/b090420.txt">Table of n, a(n) for n = 1..10000</a>
%o (Haskell)
%o a090420 n = a090420_list !! (n-1)
%o a090420_list = filter ((== 1) . a090418) [1..]
%o -- _Reinhard Zumkeller_, Aug 07 2012
%Y Cf. A004676, A007088.
%Y Cf. A090423 (subsequence).
%K nonn,base
%O 1,1
%A _Reinhard Zumkeller_, Nov 30 2003
%E Based on corrections in A090418, data recomputed by _Reinhard Zumkeller_, Aug 07 2012
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