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..2 nX3 array.
A221186
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..2 nX3 array.
Terms
- a(0) =2a(1) =27a(2) =274a(3) =2648a(4) =23765a(5) =203122a(6) =1686374a(7) =13787513a(8) =111630017a(9) =898826748a(10) =7215684025a(11) =57832318493a(12) =463108937837
External references
- oeis: A221186