122904

Appears in sequences

• arctanh(arctan(x)+log(x+1))=2*x-1/2!*x^2+16/3!*x^3-54/4!*x^4+876/5!*x^5...at n=7A012968
• G.f.: 1/Product_{k>=1} (1 - x^(2*k^2)) * (1 - x^k).at n=39A385011