8400000domain: NAppears in sequencesTriangle whose (i,j)-th entry is binomial(i,j)*2^(i-j)*10^j.at n=33A038216Triangle whose (i,j)-th entry is binomial(i,j)*10^(i-j)*2^j.at n=30A038304Smallest number m such that tau(k) * k = m has exactly n solutions when tau(k) is the number of divisors of k.at n=4A338381