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A013323 Numerator of [x^n] in the Taylor series arccosh(exp(x)-arcsinh(x))= x+x^2/3 -x^3/18 -14*x^4/135 +47*x^5/3240 +3527*x^6/68040 -4787*x^7/680400-... 0
1, 1, -1, -14, 47, 3527, -4787, -6421, 11467, 523798423, -3983516101, -1424955853, 1543134469573, 2574843844561, -116899300585349, -130778050341326449, 86229762965796109, 597078237074537664671 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

COMMENTS

The inner function has the e.g.f. exp(x)-arcsinh(x) = 1 +0*x/1!+1*x^2/2! +2*x^3/3! +1*x^4/4! -8*x^5/5! +1*x^6/6! +226*x^7/7! +1*x^8/8! -11024*x^9/9! +...

LINKS

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

CROSSREFS

Sequence in context: A243041 A243042 A243043 * A205475 A205753 A232826

Adjacent sequences:  A013320 A013321 A013322 * A013324 A013325 A013326

KEYWORD

sign,frac

AUTHOR

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

EXTENSIONS

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

STATUS

approved

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Last modified November 19 10:44 EST 2017. Contains 294936 sequences.