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A043451
Numbers having three 7's in base 8.
0
511, 1023, 1535, 2047, 2559, 3071, 3583, 3647, 3711, 3775, 3839, 3903, 3967, 4031, 4039, 4047, 4055, 4063, 4071, 4079, 4087, 4088, 4089, 4090, 4091, 4092, 4093, 4094, 4607, 5119, 5631, 6143, 6655, 7167, 7679, 7743, 7807
OFFSET
1,1
MATHEMATICA
Select[Range[8000], DigitCount[#, 8, 7]==3&] (* Harvey P. Dale, Sep 13 2022 *)
CROSSREFS
Cf. A007094.
Sequence in context: A277172 A023691 A045118 * A158011 A032656 A031899
KEYWORD
nonn,base
STATUS
approved