44454domain: NAppears in sequencesNumbers having four 4's in base 10.at n=25A043508Smallest natural number requiring n letters in Spanish.at n=44A161353Number of (w,x,y,z) with all terms in {1,...,n} and w >= |x-y| + |y-z|.at n=18A212675Numbers which have only digits 4 and 5 in base 10.at n=32A256290