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%I #12 Jun 29 2021 02:19:40
%S 56,71,120,135,184,199,248,263,312,327,376,391,440,449,450,451,452,
%T 453,454,456,464,472,480,488,496,527,535,543,551,559,567,569,570,571,
%U 572,573,574,583,632,647,696,711,760,775,824,839,888,903,952,961,962
%N Numbers whose base-8 representation has the same nonzero number of 0's and 7's.
%Y Cf. A007094.
%K nonn,base,easy
%O 1,1
%A _Olivier Gérard_