Number of 4 X n 0..1 arrays with every element equal to 0, 1, 3 or 4 horizontally or antidiagonally adjacent elements, with upper left element zero.
A302083
Number of 4 X n 0..1 arrays with every element equal to 0, 1, 3 or 4 horizontally or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =8a(1) =34a(2) =115a(3) =265a(4) =692a(5) =2838a(6) =10526a(7) =36080a(8) =126064a(9) =451725a(10) =1619838a(11) =5790181a(12) =20746320a(13) =74543378a(14) =267962891a(15) =963182733a(16) =3463443128a(17) =12458351250a(18) =44819027270a(19) =161244816456a(20) =580146524964
External references
- oeis: A302083