Equals two maps: number of 3Xn binary arrays indicating the locations of corresponding elements equal to exactly two of their horizontal, diagonal and antidiagonal neighbors in a random 0..3 3Xn array.
A220960
Equals two maps: number of 3Xn binary arrays indicating the locations of corresponding elements equal to exactly two of their horizontal, diagonal and antidiagonal neighbors in a random 0..3 3Xn array.
Terms
- a(0) =1a(1) =23a(2) =142a(3) =1769a(4) =15640a(5) =135445a(6) =1135785a(7) =9319689a(8) =75739525a(9) =610550298a(10) =4906067283a(11) =39329548159a(12) =314985289528
External references
- oeis: A220960