A013446 cosh(tan(x)-arctan(x))=1+160/6!*x^6-1792/8!*x^8+484224/10!*x^10...

1, 0, 0, 160, -1792, 484224, -30840832, 7718963200, -1315838558208, 426971596029952, -136067874243248128, 61019499461102272512, -30246038986591439945728, 18590454932996390870056960

Offset

0,4

Links

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

Crossrefs

Sequence in context: A281404 A127409 A013447 * A013444 A013448 A234650

Adjacent sequences: A013443 A013444 A013445 * A013447 A013448 A013449

Keyword

sign

Author

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

Status

approved