-1751

Appears in sequences

• sech(tan(tanh(x)))=1-1/2!*x^2+5/4!*x^4-13/6!*x^6-1751/8!*x^8...at n=4A012173
• Expansion of Product_{k>=1} (1 - x^k)^sigma(k).at n=23A288385
• E.g.f. satisfies: A(x)^3 * log(A(x)) = 1 - exp(-x).at n=4A349657