189597domain: NAppears in sequencesSmallest k for which k, 2k, ... nk all contain the digit 7.at n=10A039938Smallest k for which k, 2k, ... nk all contain the digit 7.at n=11A039938Smallest k for which k, 2k, ... nk all contain the digit 7.at n=12A039938A039938 with duplicates removed.at n=9A285846