Number of 3 X n 0..1 arrays with every element equal to 0, 1, 4 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
A302516
Number of 3 X n 0..1 arrays with every element equal to 0, 1, 4 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =4a(1) =4a(2) =11a(3) =15a(4) =21a(5) =52a(6) =118a(7) =220a(8) =408a(9) =852a(10) =1764a(11) =3460a(12) =6796a(13) =13732a(14) =27708a(15) =55140a(16) =109788a(17) =220132a(18) =441244a(19) =881380a(20) =1760796a(21) =3523812a(22) =7051548a(23) =14098660a(24) =28189468a(25) =56387812a(26) =112791324a(27) =225564900a(28) =451098396a(29) =902232292
External references
- oeis: A302516