Number of 3 X n 0..1 arrays with no element equal to more than one of its horizontal and antidiagonal neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.
A281058
Number of 3 X n 0..1 arrays with no element equal to more than one of its horizontal and antidiagonal neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.
Terms
- a(0) =0a(1) =6a(2) =68a(3) =239a(4) =618a(5) =1403a(6) =2828a(7) =5482a(8) =10342a(9) =19136a(10) =34907a(11) =62976a(12) =112617a(13) =199929a(14) =352771a(15) =619208a(16) =1081946a(17) =1882951a(18) =3265367a(19) =5644772a(20) =9730124a(21) =16728760a(22) =28693405a(23) =49108842a(24) =83882613a(25) =143016171a(26) =243420929a(27) =413658928a(28) =701916100a(29) =1189400585
External references
- oeis: A281058