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%I #5 Mar 30 2012 17:29:13
%S 17,3,6,2,1,21,35,43,23,34,47,10,26,4,14,15,12,40,18,54,51,5,27,9,132,
%T 63,166,98,78,24,30,58,105,71,75,57,70,42,11,19,38,217,285,36,77,64,
%U 56,259,45,93,102,60,122,66,96,103,267,255,92,91,276,152,208,204,90,138
%N a(1) = 17. For n > 1, a(n) is the least unused number such that every concatenation a(n)a(n-1)...a(2)a(1) is prime.
%C Is this a rearrangement of the natural numbers?
%Y Cf. A089710, A089711, A089560-A089573.
%K base,nonn
%O 1,1
%A _Ray Chandler_, Nov 22 2003
%E Edited by _Charles R Greathouse IV_, Apr 29 2010
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