1063635domain: NAppears in sequencesa(1)=4, a(2)=3, a(n) = 4*a(n-1) + 3*a(n-2).at n=9A189742Number of partitions of n into two sorts of parts having exactly 10 parts of the second sort.at n=11A258480Positions of zeros in A378505.at n=21A379013