Number of (n+1)X2 0..4 arrays with the permanents of all 2X2 subblocks equal and nonzero.
A204725
Number of (n+1)X2 0..4 arrays with the permanents of all 2X2 subblocks equal and nonzero.
Terms
- a(0) =544a(1) =1624a(2) =4772a(3) =15688a(4) =50920a(5) =171860a(6) =576738a(7) =1965706a(8) =6689546a(9) =22932416a(10) =78640444a(11) =270790262a(12) =933412812a(13) =3226219066a(14) =11165062980a(15) =38716535168a(16) =134425106068a(17) =467465565780
External references
- oeis: A204725