Equals two maps: number of nX3 binary arrays indicating the locations of corresponding elements equal to exactly two of their horizontal, vertical and antidiagonal neighbors in a random 0..3 nX3 array.
A220530
Equals two maps: number of nX3 binary arrays indicating the locations of corresponding elements equal to exactly two of their horizontal, vertical and antidiagonal neighbors in a random 0..3 nX3 array.
Terms
- a(0) =2a(1) =27a(2) =274a(3) =2660a(4) =23948a(5) =204634a(6) =1697940a(7) =13869434a(8) =112203992a(9) =902932630a(10) =7245817986a(11) =58059100355
External references
- oeis: A220530