Number of nX2 0..5 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors.
A203332
Number of nX2 0..5 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors.
Terms
- a(0) =1a(1) =6a(2) =36a(3) =161a(4) =846a(5) =5545a(6) =35483a(7) =216488a(8) =1340730a(9) =8480848a(10) =53643799a(11) =338093942a(12) =2134537993a(13) =13508527719a(14) =85530509012a(15) =541535824313
External references
- oeis: A203332