176410domain: NAppears in sequencesNumbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 84.at n=9A031762a(n) = (n-1)*n*(n+1)*(n+2)*(2n+11)/120.at n=23A130857Sum of positive Dyson's ranks of all partitions of n.at n=41A209616