-3904

Appears in sequences

• Exponential Riordan array [sech(2x), arctan(tanh(x))].at n=21A166318
• Triangle T(n,k) = A015440(k) - A015440(n) + A015440(n-k), read by rows.at n=46A176263
• Triangle T(n,k) = A015440(k) - A015440(n) + A015440(n-k), read by rows.at n=53A176263
• Square array A(n,k), n >= 0, k >= 0, read by antidiagonals, where column k is the expansion of 2/(1 + k*x + sqrt(1 + 2*k*x + k*(k+4)*x^2)).at n=61A307968
• a(n) = Glaisher's function beta(2n+1).at n=26A322032
• Expansion of (1 + x)^2 / ((1 - x)^2*(1 + 2*x + 2*x^2)^2).at n=20A322040
• a(n) = 2^n*E2_{n}(1/2) with E2_{n} the polynomials defined in A326480.at n=6A326483
• Triangle read by rows, generalized Eulerian polynomials evaluated at x = -1.at n=23A337996