Number of n X 3 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,2,3,0,1 for x=0,1,2,3,4.
A196804
Number of n X 3 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,2,3,0,1 for x=0,1,2,3,4.
Terms
- a(0) =1a(1) =3a(2) =16a(3) =37a(4) =120a(5) =420a(6) =1468a(7) =4801a(8) =15885a(9) =53128a(10) =178165a(11) =594582a(12) =1983454a(13) =6622194a(14) =22119691a(15) =73864009a(16) =246623786a(17) =823483995a(18) =2749775102a(19) =9181948002a(20) =30659615818a(21) =102376096183a(22) =341847401583
External references
- oeis: A196804