1558865

Appears in sequences

• Expansion of log(1+tan(x)/cos(x)).at n=9A009380
• arctanh(sec(x)*tan(x))=x+7/3!*x^3+185/5!*x^5+12367/7!*x^7...at n=4A012798
• Expansion of e.g.f. log(cos(x) + tan(x)).at n=9A013011