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a(1) = 13. 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.
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%I #5 Mar 30 2012 17:29:13

%S 13,1,2,19,3,8,15,18,10,17,45,24,22,11,37,5,30,39,81,6,76,57,69,56,84,

%T 36,49,48,38,63,148,27,75,239,31,50,171,67,116,282,42,175,23,55,236,

%U 70,278,73,90,140,91,9,210,174,126,105,89,94,224,34,114,26,133,143,54,241

%N a(1) = 13. 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