Numbers n such that Sum_{k=1..n} d(r(k)) is an integer where d(r(k)) is the decimal fraction 0.r(k), where r(k) is the reverse of k (e.g. d(r(123))=0.321).

A276718

Numbers n such that Sum_{k=1..n} d(r(k)) is an integer where d(r(k)) is the decimal fraction 0.r(k), where r(k) is the reverse of k (e.g. d(r(123))=0.321).