Number of n X 2 0..1 arrays with each 1 horizontally or vertically adjacent to 0, 2 or 3 1s.
A295346
Number of n X 2 0..1 arrays with each 1 horizontally or vertically adjacent to 0, 2 or 3 1s.
Terms
- a(0) =3a(1) =8a(2) =20a(3) =51a(4) =132a(5) =341a(6) =883a(7) =2293a(8) =5964a(9) =15532a(10) =40495a(11) =105670a(12) =275929a(13) =720907a(14) =1884293a(15) =4926808a(16) =12885462a(17) =33707537a(18) =88191612a(19) =230773219a(20) =603933677a(21) =1580626249a(22) =4137115442a(23) =10829006070a(24) =28346361639a(25) =74202762892a(26) =194246812311
External references
- oeis: A295346