Number of n X 2 binary arrays with every one adjacent to another one horizontally, diagonally, antidiagonally or vertically.
A202789
Number of n X 2 binary arrays with every one adjacent to another one horizontally, diagonally, antidiagonally or vertically.
Terms
- a(0) =2a(1) =12a(2) =50a(3) =188a(4) =724a(5) =2820a(6) =10960a(7) =42544a(8) =165176a(9) =641376a(10) =2490416a(11) =9669968a(12) =37547296a(13) =145791744a(14) =566092192a(15) =2198069056a(16) =8534842304a(17) =33139784256a(18) =128677866752a(19) =499640952320
External references
- oeis: A202789