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%I #10 Sep 27 2013 06:29:41
%S 1,0,1,3,12,65,417,3094,26243,250371,2652754,30910935,392895789,
%T 5409783392,80214503397,1274329677391,21594115259540,388790596531173,
%U 7411710847692157,149142571391245758,3159081458947418511
%N a(n) = n-th derivative of Sec(Exp(z)-1) at z=0.
%H Vincenzo Librandi, <a href="/A139134/b139134.txt">Table of n, a(n) for n = 0..100</a>
%F E.G.F. = sec(exp(z)-1)
%F a(n) ~ 2*n!/((2+Pi)*log((2+Pi)/2)^(n+1)). - _Vaclav Kotesovec_, Sep 25 2013
%t Table[D[Sec[Exp[x] - 1], {x, n}] /. x -> 0, {n, 0, 30}]
%Y Cf. A080832.
%K easy,nonn
%O 0,4
%A Richard Chapling (r.chappers(AT)gmail.com), Jun 05 2008
%E Typo in Mathematica program corrected by _Vincenzo Librandi_, Sep 26 2013
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