29195397domain: NAppears in sequencesSmallest k for which k, 2k, ... nk all contain the digit 7.at n=25A039938Smallest k for which k, 2k, ... nk all contain the digit 7.at n=26A039938Smallest k for which k, 2k, ... nk all contain the digit 7.at n=27A039938A039938 with duplicates removed.at n=17A285846