OFFSET
0,3
LINKS
Alois P. Heinz, Table of n, a(n) for n = 0..100 (terms n = 0..50 from Vincenzo Librandi)
MATHEMATICA
With[{nn=40}, Take[CoefficientList[Series[Sec[Sin[Tanh[x]]], {x, 0, nn}], x] Range[0, nn]!, {1, -1, 2}]] (* Harvey P. Dale, Sep 25 2013 *)
CROSSREFS
KEYWORD
sign
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
EXTENSIONS
More terms from Harvey P. Dale, Sep 25 2013
STATUS
approved