Number of binary arrangements of total n 1's, without adjacent 1's on n X n torus connected n-s.
A197990
Number of binary arrangements of total n 1's, without adjacent 1's on n X n torus connected n-s.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =27a(4) =664a(5) =19375a(6) =712536a(7) =31474709a(8) =1623421808a(9) =95752130751
External references
- oeis: A197990