-5540
domain: Z
Appears in sequences
- a(n) = n! * [x^n] (x * tanh(x) * sech(x)) / 2.at n=8A326719
- 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=28A326721
- 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=32A326721
- 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=48A326722
- 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=52A326722
- Triangle with Euler (secant) numbers, read by rows, T(n, k) for 0 <= k <= n.at n=11A326724
- Triangle with Euler (secant) numbers, read by rows, T(n, k) for 0 <= k <= n.at n=13A326724