OFFSET
1,1
MATHEMATICA
SequencePosition[Table[If[SequenceCount[IntegerDigits[n, 5], {1, 2}]>0 || SequenceCount[IntegerDigits[n, 5], {2, 1}]>0, 1, 0], {n, 700}], {0, 1}][[All, 2]] (* Harvey P. Dale, Jan 14 2022 *)
CROSSREFS
KEYWORD
nonn,base
AUTHOR
STATUS
approved