94595072domain: NAppears in sequencesa(n) = 2^(n-1)*binomial(2*n-3, n-1).at n=10A069723Duplicate of A069723.at n=10A082142a(n) = binomial(n+9,9)*2^n.at n=10A1403549-quantum transitions in systems of N >= 9 spin 1/2 particles, in columns by combination indices.at n=30A213351