-30336

Appears in sequences

• Expansion of e.g.f. arcsin(arctan(x)^2), even powers only.at n=3A012458
• sinh(arctan(x)*arctan(x))=2/2!*x^2-16/4!*x^4+488/6!*x^6-30336/8!*x^8...at n=4A012461