Number of n X 2 0..1 arrays with the number of 1's horizontally, antidiagonally or vertically adjacent to some 0 two less than the number of 0's adjacent to some 1.
A289645
Number of n X 2 0..1 arrays with the number of 1's horizontally, antidiagonally or vertically adjacent to some 0 two less than the number of 0's adjacent to some 1.
Terms
- a(0) =0a(1) =2a(2) =11a(3) =44a(4) =170a(5) =642a(6) =2421a(7) =9142a(8) =34572a(9) =131086a(10) =498465a(11) =1900928a(12) =7269978a(13) =27879108a(14) =107183763a(15) =413052074a(16) =1595247760a(17) =6173412924a(18) =23934713193a(19) =92955294982a(20) =361580812792
External references
- oeis: A289645