181138domain: NAppears in sequencesConsider recurrence b(0) = (2n+1)/2, b(n) = b(0)*ceiling(b(n-1)); sequence gives first integer reached.at n=19A081849Numbers that are the sum of four fourth powers in three or more ways.at n=17A344241Numbers that are the sum of four fourth powers in exactly three ways.at n=17A344242