1019051

Appears in sequences

• Antidiagonal sums of triangular array T: T(j,1) = 1 for ((j-1) mod 6) < 3, else 0; T(j,k) = T(j-1,k-1) + T(j-1,k) for 2 <= k <= j.at n=40A131025
• Convolution related to array A205497 and to generating functions for the rows of the array form of A050446.at n=5A205495
• a(n) = A205497(2*n, n - 1). The central coefficients of the Eulerian zig-zag polynomials.at n=6A373754
• a(n) = A205497(n, floor((n - 1) / 2)). The middle coefficients of the Eulerian zig-zag polynomials.at n=12A373755