Number of ways to place two dimers on an n-cube.

Terms

a(0) =0a(1) =2a(2) =42a(3) =400a(4) =2840a(5) =17376a(6) =97440a(7) =516608a(8) =2634624a(9) =13058560a(10) =63320576a(11) =301707264a(12) =1417009152a(13) =6575120384a(14) =30195425280a(15) =137430827008a(16) =620604391424