A012216 sinh(arctan(arcsinh(x)))=x-2/3!*x^3+24/5!*x^5-664/7!*x^7+28416/9!*x^9...

1, -2, 24, -664, 28416, -942336, -260697984, 165900454656, -85943912448000, 48584004553543680, -31574321393019125760, 23832746038658540666880, -20858343927838973179822080, 21048655959583804491297914880

Offset

0,2

Links

Table of n, a(n) for n=0..13.

Crossrefs

Bisection of A012213.

Sequence in context: A193442 A123741 A302579 * A012118 A012375 A012750

Adjacent sequences: A012213 A012214 A012215 * A012217 A012218 A012219

Keyword

sign

Author

Patrick Demichel (patrick.demichel(AT)hp.com)

Status

approved