%I #20 Jun 22 2017 05:37:34
%S 0,1,0,1,0,1,0,1,-1,14,-140,1804,-27413,487469,-10026347,236192434,
%T -6317862397,190439655627,-6425425249652,241207241774251,
%U -10020155328258126,458387180159766539,-22989944171828251745,1259023596072554784855,-75008667460769643668557
%N a(n) = ceiling(Bernoulli(2n)/(-4n)).
%D F. Hirzebruch et al., Manifolds and Modular Forms, Vieweg, 2nd ed. 1994, p. 130.
%D Douglas C. Ravenel, Complex cobordism theory for number theorists, Lecture Notes in Mathematics, 1326, Springer-Verlag, Berlin-New York, 1988, pp. 123-133.
%H T. D. Noe, <a href="/A003457/b003457.txt">Table of n, a(n) for n = 1..100</a>
%H R. C. Read, <a href="/A001004/a001004.pdf">On general dissections of a polygon</a>, Preprint (1974)
%H <a href="/index/Be#Bernoulli">Index entries for sequences related to Bernoulli numbers.</a>
%t Table[Ceiling[BernoulliB[2n]/(-4n)], {n, 24}] (* _Alonso del Arte_, Jul 11 2012 *)
%Y Cf. A003414 (floor instead of ceiling).
%K sign
%O 1,10
%A _N. J. A. Sloane_