Number of n X n symmetric binary matrices with each 1 adjacent to no more than 1 E, S or NW neighboring 1.
A191712
Number of n X n symmetric binary matrices with each 1 adjacent to no more than 1 E, S or NW neighboring 1.
Terms
- a(0) =2a(1) =6a(2) =32a(3) =299a(4) =4522a(5) =117199a(6) =5102712a(7) =374261742a(8) =46287548443
External references
- oeis: A191712