Equals two maps: number of nX3 binary arrays indicating the locations of corresponding elements equal to exactly two of their horizontal, diagonal and antidiagonal neighbors in a random 0..1 nX3 array.
A220403
Equals two maps: number of nX3 binary arrays indicating the locations of corresponding elements equal to exactly two of their horizontal, diagonal and antidiagonal neighbors in a random 0..1 nX3 array.
Terms
- a(0) =2a(1) =17a(2) =122a(3) =720a(4) =4304a(5) =25391a(6) =150079a(7) =884793a(8) =5205467a(9) =30603312a(10) =179828144a(11) =1056663902a(12) =6208358851a(13) =36476199327a(14) =214305557200
External references
- oeis: A220403