A013055 sech(sinh(x)+tan(x))=1-4/2!*x^2+56/4!*x^4-1798/6!*x^6+107880/8!*x^8...

1, -4, 56, -1798, 107880, -10378106, 1464480244, -284901103638, 73088762562608, -23906588709686578, 9710588243080306892, -4795485037260052060974, 2829543191798552453252232

Offset

0,2

Links

Table of n, a(n) for n=0..12.

Crossrefs

Sequence in context: A111849 A009159 A394268 * A243486 A322733 A012983

Adjacent sequences: A013052 A013053 A013054 * A013056 A013057 A013058

Keyword

sign

Author

Patrick Demichel

Status

approved