321531domain: NAppears in sequencesExpansion of 1/((1-x)*(1-5*x)*(1-11*x)).at n=5A016238Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 27.at n=20A031705Number of partitions of n^3 into n distinct nonzero squares.at n=16A133102a(n) = 729*n^2 + 2*n.at n=20A158396