Number of n X 3 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 0 or 2 neighboring 1s.

A297452

Number of n X 3 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 0 or 2 neighboring 1s.

Terms

    a(0) =5a(1) =25a(2) =92a(3) =390a(4) =1652a(5) =6888a(6) =28971a(7) =121854a(8) =512165a(9) =2153841a(10) =9057847a(11) =38091340a(12) =160192797a(13) =673691652a(14) =2833214557a(15) =11915133080a(16) =50109322975a(17) =210735765317a(18) =886253689076

External references