Number of solutions to non-attacking reflecting queens problem.

Terms

a(0) =1a(1) =1a(2) =0a(3) =0a(4) =2a(5) =4a(6) =0a(7) =2a(8) =10a(9) =32a(10) =38a(11) =140a(12) =496a(13) =1186a(14) =3178a(15) =16792a(16) =82038a(17) =289566a(18) =1139874a(19) =5914118a(20) =33800010a(21) =142337180a(22) =721286448a(23) =4384569864a(24) =28417161758a(25) =163597795748