91451domain: NAppears in sequencesNumbers k such that the period of the continued fraction for sqrt(k) contains exactly 61 ones.at n=8A031829Number of days after Jan 01 1000 such that the date written in the ISO-8601-format YYYYMMDD is palindromic.at n=31A210883Limiting reverse row of the array A274193.at n=44A274200