777920domain: NAppears in sequencesa(0) = 1; for n >= 1, a(n) = A059897(n, a(n-1)).at n=18A284567Triangle T(n,k) (1 <= k <= n) read by rows: T(n,k) = c_n * F(k)/F(k+2) where c_n = LCM of F(3), F(4), ... F(n+2) (and F() are the Fibonacci numbers).at n=33A374667