Number of 3 X n 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 1 1 and 1 0 1 vertically.
A208689
Number of 3 X n 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 1 1 and 1 0 1 vertically.
Terms
- a(0) =6a(1) =36a(2) =78a(3) =282a(4) =768a(5) =2430a(6) =7086a(7) =21588a(8) =64230a(9) =193554a(10) =579264a(11) =1740054a(12) =5216502a(13) =15655428a(14) =46956702a(15) =140885610a(16) =422631744a(17) =1267935822a(18) =3803741790a(19) =11411331636a(20) =34233822966a(21) =102701747106a(22) =308104791168a(23) =924315101862
External references
- oeis: A208689