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Numbers whose base-7 representation has the same nonzero number of 2's and 6's.
0

%I #12 Jun 29 2021 02:18:20

%S 20,44,69,93,104,111,125,132,139,140,141,143,144,145,167,191,216,240,

%T 265,289,296,303,308,309,311,312,313,317,324,331,363,387,412,436,447,

%U 454,468,475,482,483,484,486,487,488,510,534,559,583,608,632,639,646

%N Numbers whose base-7 representation has the same nonzero number of 2's and 6's.

%Y Cf. A007093.

%K nonn,base,easy

%O 1,1

%A _Olivier GĂ©rard_