Number of (n+2)X(3+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000000 00000001 or 00010101.
A260470
Number of (n+2)X(3+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000000 00000001 or 00010101.
Terms
- a(0) =103a(1) =213a(2) =658a(3) =1723a(4) =4607a(5) =13198a(6) =36254a(7) =98246a(8) =272542a(9) =752720a(10) =2061534a(11) =5677324a(12) =15656100a(13) =43045526a(14) =118431170a(15) =326172286a(16) =897659278a(17) =2470110390a(18) =6799627354a(19) =18715886532a(20) =51508911086a(21) =141773805068a(22) =390225182152
External references
- oeis: A260470