Number of n X n 0..2 arrays with no element equal to any value at offset (-1,-2), (-2,-1) or (-1,0) and new values introduced in order 0..2.
A274722
Number of n X n 0..2 arrays with no element equal to any value at offset (-1,-2), (-2,-1) or (-1,0) and new values introduced in order 0..2.
Terms
- a(0) =1a(1) =6a(2) =68a(3) =1632a(4) =84948a(5) =8960464a(6) =1980677448a(7) =905233056800
External references
- oeis: A274722