A013429 sech(arcsin(x)-tanh(x))=1-90/6!*x^6+1176/8!*x^8-185094/10!*x^10...

1, 0, 0, -90, 1176, -185094, 6953628, -2271831562, 113771489552, -90523142172238, 2740534463632996, -9209167403962507058, -464269042403340299048, -2066044589238157561264950

Offset

0,4

Links

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

Crossrefs

Sequence in context: A013427 A013425 A013428 * A008449 A213455 A155016

Adjacent sequences: A013426 A013427 A013428 * A013430 A013431 A013432

Keyword

sign

Author

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

Status

approved