Number of nX3 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,2,2,0,2 for x=0,1,2,3,4.
A197643
Number of nX3 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,2,2,0,2 for x=0,1,2,3,4.
Terms
- a(0) =1a(1) =11a(2) =82a(3) =342a(4) =1649a(5) =9007a(6) =49381a(7) =256485a(8) =1303838a(9) =6775152a(10) =35730226a(11) =187160271a(12) =972480937a(13) =5058363340a(14) =26414032504a(15) =137991741860a(16) =719704308772
External references
- oeis: A197643