Number of ways to place n non-attacking bishops on a 2 X 2n board.
A199033
Number of ways to place n non-attacking bishops on a 2 X 2n board.
Terms
- a(0) =1a(1) =4a(2) =22a(3) =128a(4) =771a(5) =4744a(6) =29618a(7) =186880a(8) =1188679a(9) =7608764a(10) =48953224a(11) =316283264a(12) =2050706932a(13) =13336273528a(14) =86953633242a(15) =568221290496
External references
- oeis: A199033