Number of (n+1)X4 0..3 arrays with the number of clockwise edge increases in every 2X2 subblock equal to one, and every 2X2 determinant nonzero.
A205921
Number of (n+1)X4 0..3 arrays with the number of clockwise edge increases in every 2X2 subblock equal to one, and every 2X2 determinant nonzero.
Terms
- a(0) =1828a(1) =15561a(2) =67372a(3) =583542a(4) =2570656a(5) =22176946a(6) =98991836a(7) =849405824a(8) =3837701468a(9) =32699583658a(10) =149381183572
External references
- oeis: A205921