Equals two maps: number of nX3 binary arrays indicating the locations of corresponding elements equal to exactly two of their horizontal and vertical neighbors in a random 0..3 nX3 array.
A220428
Equals two maps: number of nX3 binary arrays indicating the locations of corresponding elements equal to exactly two of their horizontal and vertical neighbors in a random 0..3 nX3 array.
Terms
- a(0) =2a(1) =23a(2) =236a(3) =2103a(4) =18366a(5) =155250a(6) =1286012a(7) =10530541a(8) =85522873a(9) =690893996a(10) =5562055980a(11) =44675368067a(12) =358307397221
External references
- oeis: A220428