Number of 4 X n 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 0 1 and 1 0 1 vertically.
A207172
Number of 4 X n 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 0 1 and 1 0 1 vertically.
Terms
- a(0) =8a(1) =64a(2) =168a(3) =603a(4) =1612a(5) =3952a(6) =11452a(7) =32021a(8) =84300a(9) =231616a(10) =641775a(11) =1736910a(12) =4732822a(13) =12996466a(14) =35450695a(15) =96651608a(16) =264382416a(17) =722256895a(18) =1971272340a(19) =5385783204a(20) =14714016328a(21) =40180554949a(22) =109749174712a(23) =299799902720a(24) =818831131779
External references
- oeis: A207172