Equals two maps: number of nX4 binary arrays indicating the locations of corresponding elements equal to exactly two of their horizontal and antidiagonal neighbors in a random 0..1 nX4 array.
A220325
Equals two maps: number of nX4 binary arrays indicating the locations of corresponding elements equal to exactly two of their horizontal and antidiagonal neighbors in a random 0..1 nX4 array.
Terms
- a(0) =4a(1) =48a(2) =572a(3) =6657a(4) =76627a(5) =876714a(6) =10004541a(7) =114058230a(8) =1299991681a(9) =14816159113a(10) =168863397427
External references
- oeis: A220325