134752domain: NAppears in sequencestan(log(x+1)-tanh(x)) = -1/2!*x^2+4/3!*x^3-6/4!*x^4+8/5!*x^5... .at n=7A013284Expansion of e.g.f. arctanh(log(x+1) - tanh(x)).at n=9A013290Conjecturally, number of infinitely recurring prime patterns of width 2n-1.at n=31A023189