275675400

Appears in sequences

• Triangle of coefficients of Bessel polynomials {y_n(x)}'.at n=43A065931
• Triangle of coefficients of Bessel polynomials {y_n(x)}''.at n=35A065943
• Number of near-matchings on the complete graph over 2n+1 vertices.at n=7A200142
• a(1) = 1; thereafter a(n) is the product of all 0 < m < n for which a(m) divides n.at n=17A271503
• a(n) = binomial(n+1,2)*n!/n!!.at n=15A293656
• Number of minimum edge covers of the complete graph K_n.at n=16A351990
• Triangle T(n, k) read by rows: T(n, k) = 2^n*binomial(2*n + 1, 2*k + 1) * Pochhammer(1/2, n - k) * Pochhammer(1/2, k).at n=39A380281