Number of 4Xn 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 0 1 and 0 1 1 vertically.
A207369
Number of 4Xn 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 0 1 and 0 1 1 vertically.
Terms
- a(0) =9a(1) =81a(2) =225a(3) =784a(4) =2304a(5) =5625a(6) =14641a(7) =33856a(8) =77284a(9) =173056a(10) =372100a(11) =795664a(12) =1664100a(13) =3433609a(14) =7017201a(15) =14160169a(16) =28355625a(17) =56310016a(18) =111007296a(19) =217533001a(20) =423742225a(21) =821280964a(22) =1584358416a(23) =3043287556a(24) =5823216100a(25) =11102415424
External references
- oeis: A207369