56804domain: NAppears in sequencesa(n) = (1/24)*(n+1)*(3*n^3+59*n^2+358*n+648).at n=22A090949Number of set partitions of [n] with alternating parity of elements and exactly five blocks.at n=9A305779Partial sums of the even triangular numbers (A014494).at n=43A352115