Denominator of Bernoulli(n, -1/2).

Terms

a(0) =1a(1) =1a(2) =12a(3) =4a(4) =240a(5) =16a(6) =1344a(7) =64a(8) =3840a(9) =256a(10) =33792a(11) =1024a(12) =5591040a(13) =4096a(14) =49152a(15) =16384a(16) =16711680a(17) =65536a(18) =104595456a(19) =262144a(20) =173015040a(21) =1048576a(22) =289406976a(23) =4194304a(24) =22900899840a(25) =16777216a(26) =201326592a(27) =67108864a(28) =116769423360a(29) =268435456