OFFSET
1,1
COMMENTS
This is a (thin) subsequence of the terms of A121040 ending with a 2 followed by one or more zeros and which do not otherwise contain a 2 followed by a 0. This also demonstrates that this sequence is a 10-automatic. - Charles R Greathouse IV, Apr 18 2020
MATHEMATICA
SequencePosition[Table[If[SequenceCount[IntegerDigits[n], {2, 0}]>0, 1, 0], {n, 3500}], {0, 1}][[All, 2]] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Dec 24 2018 *)
CROSSREFS
KEYWORD
nonn,base,easy
AUTHOR
STATUS
approved