OFFSET
1,1
MATHEMATICA
SequencePosition[Table[If[SequenceCount[IntegerDigits[n, 6], {1, 4}]>0, 1, 0], {n, 1400}], {0, 1}][[All, 2]] (* Harvey P. Dale, Nov 12 2021 *)
CROSSREFS
KEYWORD
nonn,base
AUTHOR
STATUS
approved