Number of n X n integer matrices, symmetric under 180 degree rotation, with adjacent elements differing by no more than 1, counting matrices differing by a constant only once.
A141445
Number of n X n integer matrices, symmetric under 180 degree rotation, with adjacent elements differing by no more than 1, counting matrices differing by a constant only once.
Terms
- a(0) =1a(1) =3a(2) =45a(3) =597a(4) =42787a(5) =2695803a(6) =923529659a(7) =278451121903
External references
- oeis: A141445