Number of 4 X n 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 0 and 1 0 1 vertically.
A208040
Number of 4 X n 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 0 and 1 0 1 vertically.
Terms
- a(0) =9a(1) =81a(2) =279a(3) =961a(4) =4743a(5) =23409a(6) =100215a(7) =429025a(8) =1942075a(9) =8791225a(10) =38933415a(11) =172423161a(12) =770225067a(13) =3440643649a(14) =15317395695a(15) =68191488225a(16) =303989603715
External references
- oeis: A208040