Number of n X 2 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 0,2,1,0,0 for x=0,1,2,3,4.

A198179

Number of n X 2 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 0,2,1,0,0 for x=0,1,2,3,4.

Terms

    a(0) =0a(1) =4a(2) =3a(3) =8a(4) =16a(5) =21a(6) =56a(7) =70a(8) =171a(9) =256a(10) =516a(11) =905a(12) =1622a(13) =3048a(14) =5293a(15) =9992a(16) =17564a(17) =32517a(18) =58330a(19) =106144a(20) =192767a(21) =348188a(22) =634426a(23) =1145535a(24) =2084360a(25) =3771658a(26) =6847617a(27) =12413706a(28) =22507930a(29) =40835531

External references