1538068480

Appears in sequences

• E.g.f.: exp(tan(x)-tanh(x))=1+4/3!*x^3+160/6!*x^6+544/7!*x^7+17920/9!*x^9...at n=14A013451
• Expansion of e.g.f. sec(tan(x) - tanh(x)) (even-indexed coefficients only).at n=7A013455