616227

Appears in sequences

• Central trinomial coefficients: largest coefficient of (1 + x + x^2)^n.at n=14A002426
• Number of symmetric, reduced unit interval schemes with n+1 intervals (n>=1).at n=28A005213
• Sum of the squares of the trinomial coefficients (A027907).at n=7A082758
• T(n,k) = largest coefficient in the expansion of (1 + ... + x^(n-1))^(2*k).at n=38A163269
• Number of n X 14 0..2 arrays with row sums 14 and column sums n.at n=1A172635
• Number of 7*n X n 0..2 arrays with row sums 2 and column sums 14.at n=1A172707
• a(n) = Sum_{k=0..n} C(n,k)*((-1)^n*(C(k,n-k)-C(k,n-k-1))+C(n-k,k+1)).at n=14A273020
• Irregular triangle read by rows: T(n,m) = number of lattice paths of type {A^H}_R terminating at point (n, m).at n=49A291080
• Square array T(n,k), n >= 0, k >= 0, read by antidiagonals, where column k is the expansion of sqrt((1+(k-4)*x+sqrt(1-2*(k+4)*x+((k-4)*x)^2)) / (2 * (1-2*(k+4)*x+((k-4)*x)^2))).at n=43A337389
• Array read by ascending antidiagonals: the s-th column gives the central s-binomial coefficients.at n=47A349933