Number of 3 X n 0..1 arrays with every element equal to 0, 2, 3, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
A303243
Number of 3 X n 0..1 arrays with every element equal to 0, 2, 3, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =4a(1) =2a(2) =18a(3) =8a(4) =60a(5) =56a(6) =236a(7) =428a(8) =1248a(9) =3264a(10) =8624a(11) =24720a(12) =65816a(13) =187464a(14) =509576a(15) =1428608a(16) =3932112a(17) =10932480a(18) =30245800a(19) =83854984a(20) =232353544a(21) =643805072a(22) =1784418352a(23) =4944349600a(24) =13703715720a(25) =37974373160a(26) =105243781928a(27) =291657188656
External references
- oeis: A303243