Number of 3 X n 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 0 1 and 1 0 0 vertically.
A207961
Number of 3 X n 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 0 1 and 1 0 0 vertically.
Terms
- a(0) =6a(1) =36a(2) =102a(3) =281a(4) =699a(5) =1799a(6) =4706a(7) =12161a(8) =31356a(9) =81206a(10) =210185a(11) =543399a(12) =1405547a(13) =3636320a(14) =9405751a(15) =24328772a(16) =62932300a(17) =162787659a(18) =421078225a(19) =1089199555a(20) =2817430618a(21) =7287821163a(22) =18851338264a(23) =48762622760a(24) =126133900375a(25) =326269518673
External references
- oeis: A207961