393372

Appears in sequences

• a(n) = 9*(n-2)^2 * (n^2 - 2*n - 1).at n=14A060788
• Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 1100-0111-1100 pattern in any orientation.at n=26A146679
• Triangle read by rows, T(n, k) = binomial(n, k) * Sum_{j=0..n-k} E(n-k, j)*2^j, where E(n, k) are the Eulerian numbers A173018(n, k), for 0 <= k <= n.at n=48A154921
• Triangle relating to ordered Bell numbers, A000670.at n=42A208744
• Triangle read by rows: T(n,k) is the number of labeled loop-threshold graphs on vertex set [n] with k components, for n >= 1 and 1 <= k <= n.at n=39A350531
• a(0) = 1; a(n) = Sum_{k=0..n-1} binomial(n+3,k+3) * a(k).at n=6A352863