Number of minimal edge cuts in the 2 X n rook graph.

Terms

a(0) =1a(1) =6a(2) =22a(3) =84a(4) =346a(5) =1476a(6) =6322a(7) =26844a(8) =112666a(9) =467796a(10) =1925122a(11) =7867404a(12) =31980586a(13) =129475716a(14) =522603922a(15) =2104600764a(16) =8461122106a(17) =33972973236a(18) =136278002722a(19) =546271650924