Number of nX2 arrays of occupancy after each element moves to some horizontal, vertical or antidiagonal neighbor, with no occupancy greater than 2.
A221230
Number of nX2 arrays of occupancy after each element moves to some horizontal, vertical or antidiagonal neighbor, with no occupancy greater than 2.
Terms
- a(0) =1a(1) =14a(2) =119a(3) =852a(4) =6360a(5) =47334a(6) =351402a(7) =2609499a(8) =19373481a(9) =143810755a(10) =1067445448a(11) =7922843437a(12) =58803820979a(13) =436439347912
External references
- oeis: A221230