4939200domain: NAppears in sequencesNumber of invertible octonions over Z/nZ.at n=6A239441Triangle read by rows. T(n, k) = binomial(n, k) * n!^2 / floor(n/2)!^2.at n=29A356636Triangle read by rows. T(n, k) = binomial(n, k) * n!^2 / floor(n/2)!^2.at n=34A356636