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A012708 sech(arctanh(x)*log(x+1))=1-12/4!*x^4+60/5!*x^5-570/6!*x^6... 0
1, 0, 0, 0, -12, 60, -570, 3780, -29568, 169344, -557160, -13049520, 375064008, -7823848032, 135678667488, -2221166656800, 32120158935552, -397914002426496, 2522488580207424, 61215640433391744 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,5

LINKS

Table of n, a(n) for n=0..19.

CROSSREFS

Sequence in context: A012314 A233004 A012360 * A009077 A012702 A009163

Adjacent sequences:  A012705 A012706 A012707 * A012709 A012710 A012711

KEYWORD

sign

AUTHOR

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

STATUS

approved

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Last modified June 27 13:59 EDT 2022. Contains 354896 sequences. (Running on oeis4.)