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..1 nX3 array.
A220276
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..1 nX3 array.
Terms
- a(0) =2a(1) =25a(2) =148a(3) =1142a(4) =7987a(5) =55034a(6) =383153a(7) =2657666a(8) =18466741a(9) =128094083a(10) =888814278a(11) =6166025688a(12) =42777035035a(13) =296733282297
External references
- oeis: A220276