204905

Appears in sequences

• exp(sec(x)*arcsin(x))=1+x+1/2!*x^2+5/3!*x^3+17/4!*x^4+85/5!*x^5...at n=9A012782
• sinh(sec(x)*arcsin(x))=x+5/3!*x^3+85/5!*x^5+3201/7!*x^7+204905/9!*x^9...at n=4A012788
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 0, 0), (0, -1, 1), (0, 1, 0), (1, 1, -1)}.at n=12A148197