49576domain: NAppears in sequencesFrom substitutional generation of Kolakoski sequence (A000002).at n=25A042942a(n) = 1^n + 7^n + 8^n.at n=5A074523The smallest positive number k such that the sum of the products of its digits when written in all bases 2 to n equals k, or -1 if no such number exists.at n=33A376860