Number of symmetric n X n integer matrices with adjacent elements differing by no more than 1, counting matrices differing by a constant only once.
A141441
Number of symmetric n X n integer matrices with adjacent elements differing by no more than 1, counting matrices differing by a constant only once.
Terms
- a(0) =1a(1) =9a(2) =171a(3) =6939a(4) =609309a(5) =116330103a(6) =48439766655
External references
- oeis: A141441