A013308 Numerator of [x^n] of the Taylor series arccosh(exp(x)-arctan(x))= x+x^2/2 -x^3/8 -17*x^4/80 +109*x^5/1920 +299*x^6/2304 -813*x^7/25600 -...

1, 1, -1, -17, 109, 299, -813, -373177, 9417917, 133861013, -796664399, -229876317317, 593496669853, 693397771163639, -8404224858061139, -282791345633671703, 1818027079738117517, 978930433926331599667

Offset

1,4

Links

Table of n, a(n) for n=1..18.

Crossrefs

Sequence in context: A156851 A354183 A141921 * A297918 A298542 A261809

Adjacent sequences: A013305 A013306 A013307 * A013309 A013310 A013311

Keyword

sign,frac

Author

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

Extensions

Values replaced by numerators. - R. J. Mathar, Dec 22 2011

Status

approved