%I #8 Mar 09 2015 09:35:18
%S 13,79,1921,2527,3133,4951,6163,6567,7173,7779,101103,103105,107109,
%T 121123,125127,133135,139141,149151,157159,169171,173175,193195,
%U 205207,221223,233235,245247,295297,349351,359361,371373,385387,391393,413415
%N Lucky numbers that are concatenations of n with n + 2.
%Y Cf. A000959, A032642.
%K nonn,base
%O 1,1
%A _Patrick De Geest_, May 15 1998
%E More terms from _Sascha Kurz_, Mar 24 2002