Number of 3Xn 0..1 arrays with every element equal to 0, 2, 3, 4, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
A303625
Number of 3Xn 0..1 arrays with every element equal to 0, 2, 3, 4, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =4a(1) =2a(2) =38a(3) =68a(4) =362a(5) =1283a(6) =5411a(7) =22516a(8) =96189a(9) =417555a(10) =1829258a(11) =8090336a(12) =35972626a(13) =160686336a(14) =719920275a(15) =3232692431a(16) =14538525542a(17) =65457371351a(18) =294941937573
External references
- oeis: A303625