A012829 tanh(sec(x)*arcsinh(x))=x-504/7!*x^7+11904/9!*x^9-1023616/11!*x^11...

1, 0, 0, -504, 11904, -1023616, 190103680, -27296677888, 6616599617536, -2038987281108992, 733961541487493120, -333541890591777587200, 180073909555827471974400, -114101788265471646305353728

Offset

0,4

Links

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

Crossrefs

Sequence in context: A141145 A253724 A166763 * A013973 A218132 A012744

Adjacent sequences: A012826 A012827 A012828 * A012830 A012831 A012832

Keyword

sign

Author

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

Status

approved