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%I #6 Jul 12 2019 20:21:21
%S 1,-6,28,-72,-176,1824,11968,-177792,-1062656,25864704,155204608,
%T -5535270912,-33211559936,1633165123584,9798991003648,
%U -635421070098432,-3812526419542016,315212388818878464,1891274332917465088,-194181169538677604352,-1165087017232048848896
%N a(n) = 2^n*E2_{n}(-1/2) with E2_{n} the polynomials defined in A326480.
%C For comments see A326480.
%p # The function E2(n) is defined in A326480.
%p seq(subs(x=-1/2, 2^n*E2(n)), n=0..22);
%Y Cf. A326480, A155585, A326481, A326482, A326483, A326484.
%K sign
%O 0,2
%A _Peter Luschny_, Jul 12 2019