Number of nX4 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,3,2,1,0 for x=0,1,2,3,4.
A197213
Number of nX4 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,3,2,1,0 for x=0,1,2,3,4.
Terms
- a(0) =1a(1) =8a(2) =44a(3) =221a(4) =1175a(5) =5982a(6) =30940a(7) =160438a(8) =828709a(9) =4285218a(10) =22165292a(11) =114628225a(12) =592784354a(13) =3065621155a(14) =15854191220a(15) =81990622115a(16) =424018125103
External references
- oeis: A197213