Number of nX4 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 2,3,0,1,4 for x=0,1,2,3,4.
A196489
Number of nX4 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 2,3,0,1,4 for x=0,1,2,3,4.
Terms
- a(0) =1a(1) =5a(2) =23a(3) =99a(4) =435a(5) =1821a(6) =7761a(7) =33445a(8) =142899a(9) =610111a(10) =2610127a(11) =11166323a(12) =47747117a(13) =204171367a(14) =873175939a(15) =3734216551a(16) =15969151905a(17) =68291795495a(18) =292051077171
External references
- oeis: A196489