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a(n) is least k such that k and 9k are anagrams in base n (written in base 10).
1

%I #5 Mar 30 2012 18:35:18

%S 1089,167580,253638,2499,48893,69034,315,6264,2532609,36,14649,12155,

%T 819,869,16974,39,570375,19773,56322,42,1305,43200,2852,59296,1489686,

%U 1649,3465,1809,2791613,152,165165,105,5699,6006,322586,256289,4987125,9108

%N a(n) is least k such that k and 9k are anagrams in base n (written in base 10).

%K nonn,base

%O 10,1

%A _David W. Wilson_