Square array T(M,N) read by antidiagonals: number of dimer tilings of a 2M x 2N Klein bottle.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =6a(5) =1a(6) =1a(7) =16a(8) =34a(9) =1a(10) =1a(11) =54a(12) =196a(13) =198a(14) =1a(15) =1a(16) =196a(17) =1666a(18) =2704a(19) =1154a(20) =1a(21) =1a(22) =726a(23) =16384a(24) =64152a(25) =37636a(26) =6726a(27) =1a(28) =1a(29) =2704