53378domain: NAppears in sequencesNumber of positive integers <= 2^n of form x^2 + 20 y^2.at n=19A054233Sum of the squarefree parts of the partitions of n into 7 parts.at n=38A309482Number of nX3 0..1 arrays with every element unequal to 1, 2, 3, 5, 7 or 8 king-move adjacent elements, with upper left element zero.at n=8A316636