Number of 4 X n 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 1 0 and 1 1 1 vertically.
A208502
Number of 4 X n 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 1 0 and 1 1 1 vertically.
Terms
- a(0) =9a(1) =81a(2) =126a(3) =324a(4) =828a(5) =2124a(6) =5436a(7) =13932a(8) =35676a(9) =91404a(10) =234108a(11) =599724a(12) =1536156a(13) =3935052a(14) =10079676a(15) =25819884a(16) =66138588a(17) =169418124a(18) =433972476a(19) =1111644972a(20) =2847534876a(21) =7294114764a(22) =18684254268a(23) =47860713324a(24) =122597730396a(25) =314040583692
External references
- oeis: A208502