Number of n X 4 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 1,3,2,4,0 for x=0,1,2,3,4.
A196918
Number of n X 4 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 1,3,2,4,0 for x=0,1,2,3,4.
Terms
- a(0) =1a(1) =4a(2) =12a(3) =37a(4) =114a(5) =335a(6) =1003a(7) =3051a(8) =9290a(9) =28268a(10) =86013a(11) =261786a(12) =796995a(13) =2426793a(14) =7389825a(15) =22503304a(16) =68527674a(17) =208684983a(18) =635506294a(19) =1935309489a(20) =5893618625a(21) =17947924171a(22) =54657124744a(23) =166448373086a(24) =506888519813
External references
- oeis: A196918