Number of n X n binary arrays, symmetric under horizontal reflection, with every 1 adjacent to at least one other 1 both bishopwise and rookwise but with no three 1s in a row bishopwise or rookwise.
A144237
Number of n X n binary arrays, symmetric under horizontal reflection, with every 1 adjacent to at least one other 1 both bishopwise and rookwise but with no three 1s in a row bishopwise or rookwise.
Terms
- a(0) =1a(1) =2a(2) =1a(3) =5a(4) =12a(5) =94a(6) =382a(7) =8683a(8) =15288a(9) =1371209a(10) =4724300a(11) =743433847a(12) =5878981024
External references
- oeis: A144237