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Numbers n such that sum of first and last digits is prime.
9

%I #4 Mar 30 2012 17:26:09

%S 1,11,12,14,16,20,21,23,25,29,30,32,34,38,41,43,47,49,50,52,56,58,61,

%T 65,67,70,74,76,83,85,89,92,94,98,101,102,104,106,111,112,114,116,121,

%U 122,124,126,131,132,134,136,141,142,144,146,151,152,154,156,161,162,164

%N Numbers n such that sum of first and last digits is prime.

%Y Cf. A046704, A007953, A088133, A088135, A088136.

%K easy,nonn,base

%O 1,2

%A _Zak Seidov_, Sep 20 2003