Number of 3 X n 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 0 0 and 1 1 1 vertically.
A207896
Number of 3 X n 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 0 0 and 1 1 1 vertically.
Terms
- a(0) =6a(1) =36a(2) =84a(3) =198a(4) =462a(5) =1080a(6) =2520a(7) =5886a(8) =13746a(9) =32100a(10) =74964a(11) =175062a(12) =408822a(13) =954720a(14) =2229552a(15) =5206662a(16) =12159090a(17) =28395060a(18) =66310836a(19) =154855350a(20) =361632894a(21) =844519416a(22) =1972201800a(23) =4605672606a(24) =10755603282a(25) =25117504404a(26) =58656777396
External references
- oeis: A207896