Number of n X 3 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 1,3,2,0,4 for x=0,1,2,3,4.
A196631
Number of n X 3 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 1,3,2,0,4 for x=0,1,2,3,4.
Terms
- a(0) =1a(1) =5a(2) =21a(3) =62a(4) =232a(5) =780a(6) =2716a(7) =9427a(8) =32612a(9) =113008a(10) =391387a(11) =1355818a(12) =4696609a(13) =16268643a(14) =56353996a(15) =195208062a(16) =676193929a(17) =2342310759a(18) =8113674993a(19) =28105465903a(20) =97356282867a(21) =337238520190
External references
- oeis: A196631