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%I #5 Oct 10 2019 00:33:27
%S 1,13,137,1379,137913,13791315,1379131521,137913152125,13791315212531,
%T 1379131521253133,137913152125313337,13791315212531333743,
%U 1379131521253133374349,137913152125313337434951
%N Concatenate lucky numbers.
%Y Cf. A019518, A000959.
%K nonn,easy,base
%O 0,2
%A _Patrick De Geest_, Jun 15 1998
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