%I #10 Jan 01 2023 09:05:07
%S 1,1,12,1,240,1,1344,1,3840,1,33792,1,5591040,1,49152,1,16711680,1,
%T 104595456,1,173015040,1,289406976,1,22900899840,1,201326592,1,
%U 116769423360,1,7689065201664,1,1095216660480,1,51539607552,1
%N Denominator of Bernoulli(n, 1/2).
%C Included for completeness, A033469 is the official version of this sequence.
%H Vincenzo Librandi, <a href="/A157780/b157780.txt">Table of n, a(n) for n = 0..250</a>
%F a(n) = denominator(-(1-2^(1-n))*Bernoulli(n)). - _Fabián Pereyra_, Dec 31 2022
%t Table[Denominator[BernoulliB[n, 1/2]], {n, 0, 50}] (* _Vincenzo Librandi_, Mar 19 2014 *)
%Y For numerators see A157779.
%K nonn,frac
%O 0,3
%A _N. J. A. Sloane_, Nov 08 2009