-30405375

Appears in sequences

• tan(arcsin(x)-arctan(x))=3/3!*x^3-15/5!*x^5+945/7!*x^7-14175/9!*x^9...at n=5A013409
• Q(3,n), where Q(m,k) is defined in A127080 and A127137.at n=16A127145