247205

Appears in sequences

• a(n) = floor(sinh(n) / n^2).at n=18A274489
• Square array read by ascending antidiagonals: T(n,k) = 1/n * [x^k] 1/((1 - x)*(1 - x^2))^(n*k) for n, k >= 1.at n=41A363419