24438960domain: NAppears in sequencesColumn 1 of A111549, which is the matrix log of A111544.at n=9A111550a(n) = (1/n!)*Sum_{i=0..n-2} 4*(2*n+1)!*(2*n-i-4)!/(i!*(n-i-2)!*(2*n-i+1)).at n=4A329776