Number of n X 4 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 1 1 and 1 0 1 vertically.
A207725
Number of n X 4 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 1 1 and 1 0 1 vertically.
Terms
- a(0) =9a(1) =81a(2) =169a(3) =441a(4) =1225a(5) =2809a(6) =6241a(7) =14161a(8) =31329a(9) =68121a(10) =148225a(11) =321489a(12) =693889a(13) =1495729a(14) =3222025a(15) =6932689a(16) =14907321a(17) =32046921a(18) =68873401a(19) =147987225a(20) =317944561a(21) =683038225a(22) =1467273025a(23) =3151811881a(24) =6770162961a(25) =14542189281a(26) =31235967169
External references
- oeis: A207725