%I #14 Aug 29 2019 17:20:06
%S 1,0,-2,0,-32,0,-704,0,-54784,0,-2610176,0,-10976325632,0,
%T -52971659264,0,-179326416191488,0,-24309257264168960,0,
%U -69389116291423404032,0,-8404514249426618810368,0,-81520321871322828385550336,0,-438807077783516207378333696,0,-690781531822985516802849636352
%N Numerator of a-sequence for Sheffer triangle A060081.
%C The denominator sequence is A176727.
%C For a- and z-sequences for Sheffer triangles see the W. Lang link under A006232.
%H W. Lang: <a href="/A176726/a176726.txt">Rationals A176726/A176727. </a>
%F E.g.f. for rational a-sequence A176726/A176727: x/log(sqrt((1+x)/(1- x))).
%e Rationals A176726(n)/A176727(n): [1, 0, -2/3, 0, -32/15, 0, -704/21,0,...].
%t max = 29; s = x/Log[Sqrt[(1+x)/(1-x)]] + O[x]^max; CoefficientList[s, x] * Range[0, max-1]! // Numerator (* _Jean-François Alcover_, Oct 04 2016 *)
%Y A176728/A176729 z-sequence for triangle A060081.
%K sign,easy,frac
%O 0,3
%A _Wolfdieter Lang_, Jul 14 2010