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Omit 7's from n.
4

%I #11 Feb 13 2024 16:57:54

%S 0,1,2,3,4,5,6,0,8,9,10,11,12,13,14,15,16,1,18,19,20,21,22,23,24,25,

%T 26,2,28,29,30,31,32,33,34,35,36,3,38,39,40,41,42,43,44,45,46,4,48,49,

%U 50,51,52,53,54,55,56,5,58,59,60,61,62,63,64,65,66,6,68,69,0,1,2

%N Omit 7's from n.

%H Alois P. Heinz, <a href="/A004182/b004182.txt">Table of n, a(n) for n = 0..20000</a>

%t FromDigits[Flatten[IntegerDigits[#]/.(7->{})]]&/@Range[0,80] (* _Harvey P. Dale_, Jun 09 2013 *)

%K nonn,base

%O 0,3

%A _N. J. A. Sloane_