A012090 arctan(arcsin(arctan(x))) = x - 3/3!*x^3 + 57/5!*x^5 - 2587/7!*x^7 + 217137/9!*x^9 - ...

1, -3, 57, -2587, 217137, -29025587, 5664605801, -1519556355275, 536514935904609, -241225069255390307, 134580033555427233689, -91237165395466088195963, 73877505225687035803070353, -70425423338543411535873624467, 78071169657855750497737512497097

Offset

0,2

Links

Table of n, a(n) for n=0..14.

Crossrefs

Sequence in context: A009723 A069992 A012196 * A210674 A281184 A012064

Adjacent sequences: A012087 A012088 A012089 * A012091 A012092 A012093

Keyword

sign

Author

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

Status

approved