156577792

Appears in sequences

• a(0)=0, a(n) = n*E(2n-1) for n >= 1, where E(n) = A000111(n) are the Euler (or up-down) numbers.at n=7A024255
• An Euler triangle.at n=29A117414
• Triangle read by rows: T(n, k) = (-1)^(n - k) * binomial(n, k) * A000182(n).at n=29A326723