OFFSET
1,1
MATHEMATICA
SequencePosition[Table[If[SequenceCount[IntegerDigits[n], {0, 4}]>0 || SequenceCount[ IntegerDigits[n], {4, 0}]>0, 1, 0], {n, 2100}], {1, 0}][[All, 1]] (* Harvey P. Dale, Aug 10 2021 *)
CROSSREFS
KEYWORD
nonn,base
AUTHOR
STATUS
approved