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A012360 Expansion of e.g.f.: sech(tan(x)*log(x+1))=1-12/4!*x^4+60/5!*x^5-570/6!*x^6+3780/7!*x^7... 0
1, 0, 0, 0, -12, 60, -570, 3780, -26880, 145152, 67800, -19702320, 483806664, -8808530016, 143791860576, -2098017710880, 26000312931840, -200354333649536, -2365679417115840, 173236427161446528 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,5
LINKS
MATHEMATICA
With[{nn=20}, CoefficientList[Series[Sech[Tan[x]Log[x+1]], {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, Nov 29 2018 *)
CROSSREFS
Sequence in context: A012517 A012314 A233004 * A012708 A009077 A012702
KEYWORD
sign
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
EXTENSIONS
Definition clarified by Harvey P. Dale, Nov 29 2018
STATUS
approved

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Last modified July 19 11:53 EDT 2024. Contains 374394 sequences. (Running on oeis4.)