Number of n X n symmetric 0..5 arrays with each element equal to at least two horizontal or vertical neighbors and with new values 0..5 introduced in lower triangular row major order.
A192999
Number of n X n symmetric 0..5 arrays with each element equal to at least two horizontal or vertical neighbors and with new values 0..5 introduced in lower triangular row major order.
Terms
- a(0) =0a(1) =1a(2) =1a(3) =6a(4) =35a(5) =697a(6) =19477a(7) =1547414a(8) =202362287a(9) =65040382838
External references
- oeis: A192999