498576domain: NAppears in sequencesa(n) = (n-2)^4 - a(n-1) - a(n-2), with a(1) = a(2) = 0.at n=35A152729a(n) = n*(3*n - 2)*(9*n^2 - 6*n - 2).at n=12A264892a(n) = (11*n + 3 + 6/(n+2)) * Catalan(n).at n=9A383776a(n) = Sum_{k=0..floor(n/2)} (-1)^k * binomial(2*n-2*k-2,n-2*k).at n=12A390683