117971domain: NAppears in sequencesa(n) = (5*n^9 - 30*n^7 + 63*n^5 - 50*n^3 + 12*n)/360.at n=6A239094Second partial sums of seventh powers (A001015).at n=4A250212a(n) = 1*5^n + 2*4^n + 3*3^n + 4*2^n + 5*1^n.at n=7A254031Number of Dyck paths of semilength n such that no positive level has fewer than eight peaks.at n=21A288684