Number of 4 X n 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 1 0 and 1 1 1 vertically.
A209225
Number of 4 X n 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 1 0 and 1 1 1 vertically.
Terms
- a(0) =9a(1) =81a(2) =126a(3) =196a(4) =504a(5) =1296a(6) =3312a(7) =8464a(8) =21712a(9) =55696a(10) =142544a(11) =364816a(12) =934992a(13) =2396304a(14) =6136272a(15) =15713296a(16) =40258384a(17) =103144336a(18) =264177872a(19) =676624144a(20) =1733335632a(21) =4440356496a(22) =11373699024a(23) =29133027856a(24) =74627823952a(25) =191168323984
External references
- oeis: A209225