-39680

Appears in sequences

• Irregular array related to the Euler numbers, read by rows, T_row(n) = A326722_row(2*n) + A326722_row(2*n+1) for n >= 0, T_row(-1) = [1].at n=33A326721
• T(n, k) = n! * [x^k] [y^n] sec(z)(x + z*sin(z)/y) where z = y*sqrt(x^2 - 1) for 0 <= k <= n+1 and T(-1, 0) = 1, triangle read by rows.at n=63A326722
• Triangle read by rows: T(n, k) = (-1)^(n - k) * binomial(n, k) * A000182(n).at n=19A326723