Number of nX4 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 2,3,1,1,0 for x=0,1,2,3,4.
A197499
Number of nX4 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 2,3,1,1,0 for x=0,1,2,3,4.
Terms
- a(0) =1a(1) =9a(2) =53a(3) =181a(4) =967a(5) =4447a(6) =20411a(7) =99367a(8) =473509a(9) =2249979a(10) =10740561a(11) =51245685a(12) =244406613a(13) =1165674879a(14) =5559988993a(15) =26520385505a(16) =126494970513a(17) =603345410731
External references
- oeis: A197499