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%I #7 Apr 07 2014 00:41:36
%S 1,2,1,4,3,12,1,2,1,2,3,6,1,6,3,4,5,4,5,8,7,2,21,10,17,2,1,2,3,4,1,2,
%T 7,14,3,4,1,2,1,2,11,6,5,18,3,4,3,6,1,2,1,8,5,4,7,2,1,4,5,4,11,2,1,4,
%U 3,12,1,2,9,2,3,6,1,8,9,2,3,6,1,2,1,2,5,4,929,6,3,4,5,12,1,2,1
%N Smallest n concatenated with n + d (d = 0,1,2,3,...) is a prime.
%C First terms of sequences '1', A030457, A032617-A032624, continued with displacements d > 9.
%e 23rd term = 21: 21 + 22 (=23-1) = 43: '21' and '43' = 2143 and this is a prime.
%Y Cf. A032663.
%K nonn,base
%O 0,2
%A _Patrick De Geest_, May 15 1998
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