63245domain: NAppears in sequencesa(n) = 5*a(n-3) - a(n-6) with terms 1..6 as 0, 1, 2, 5, 7, 9.at n=21A142879Number of partitions of n+2 with largest inscribed rectangle having area <= n.at n=41A218623a(n) = 5*(3*n+1)*(9*n+8)/2 (n>=0).at n=30A304508