Number of nX4 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 1 0 and 1 0 1 vertically.
A207914
Number of nX4 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 1 0 and 1 0 1 vertically.
Terms
- a(0) =9a(1) =81a(2) =271a(3) =1309a(4) =5371a(5) =23637a(6) =101069a(7) =438103a(8) =1887667a(9) =8151773a(10) =35161937a(11) =151744767a(12) =654767065a(13) =2825582407a(14) =12192964863a(15) =52615498559a(16) =227045509685a(17) =979746980809
External references
- oeis: A207914