Number of (n+1) X 2 0..3 arrays with the number of clockwise edge increases in every 2 X 2 subblock equal to one, and every 2 X 2 determinant nonzero.
A205919
Number of (n+1) X 2 0..3 arrays with the number of clockwise edge increases in every 2 X 2 subblock equal to one, and every 2 X 2 determinant nonzero.
Terms
- a(0) =76a(1) =389a(2) =1828a(3) =9144a(4) =43572a(5) =215294a(6) =1035724a(7) =5082472a(8) =24576282a(9) =120140890a(10) =582580746a(11) =2841986300a(12) =13802576730a(13) =67255368928a(14) =326915006288
External references
- oeis: A205919