2335689domain: NAppears in sequencesAdd 1, multiply by 1, add 2, multiply by 2, etc., start with 1.at n=18A019463a(0)=1, a(n) = n*(a(n-1) + n).at n=9A053817Integers N that yield exactly 10 different digits when all products of two successive digits of N are considered.at n=26A296450