Number of n X n symmetric binary matrices with each 1 adjacent to exactly 1 antidiagonally neighboring 1.
A191650
Number of n X n symmetric binary matrices with each 1 adjacent to exactly 1 antidiagonally neighboring 1.
Terms
- a(0) =1a(1) =2a(2) =4a(3) =8a(4) =32a(5) =192a(6) =1728a(7) =25920a(8) =518400a(9) =14515200a(10) =609638400a(11) =36578304000
External references
- oeis: A191650