Number of 3 X n 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 0 0 and 1 1 1 vertically.
A207846
Number of 3 X n 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 0 0 and 1 1 1 vertically.
Terms
- a(0) =6a(1) =36a(2) =72a(3) =180a(4) =432a(5) =1044a(6) =2520a(7) =6084a(8) =14688a(9) =35460a(10) =85608a(11) =206676a(12) =498960a(13) =1204596a(14) =2908152a(15) =7020900a(16) =16949952a(17) =40920804a(18) =98791560a(19) =238503924a(20) =575799408a(21) =1390102740a(22) =3356004888a(23) =8102112516a(24) =19560229920a(25) =47222572356a(26) =114005374632
External references
- oeis: A207846