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Metadromes: digits in base 7 are in strict ascending order.
0

%I #12 Jun 10 2019 23:07:23

%S 0,1,2,3,4,5,6,9,10,11,12,13,17,18,19,20,25,26,27,33,34,41,66,67,68,

%T 69,74,75,76,82,83,90,123,124,125,131,132,139,180,181,188,237,466,467,

%U 468,474,475,482,523,524,531,580,866,867,874,923,1266,3267,3268,3275,3324,3667,6068,22875

%N Metadromes: digits in base 7 are in strict ascending order.

%t Union[Flatten[FromDigits[#,7]&/@Select[Permutations[Range[0,6],6], Min[ Differences[#]]>0&]]] (* _Harvey P. Dale_, Jul 25 2013 *)

%K nonn,base,fini,full,easy

%O 1,3

%A _Olivier GĂ©rard_

%E More terms from _Sean A. Irvine_, Jun 10 2019