Number of nX2 arrays containing 2 copies of 0..n-1 with no element 1 greater than its northwest or southwest neighbor modulo n and the upper left element equal to 0.
A266570
Number of nX2 arrays containing 2 copies of 0..n-1 with no element 1 greater than its northwest or southwest neighbor modulo n and the upper left element equal to 0.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =74a(4) =2668a(5) =150836a(6) =12011058a(7) =1279437414a(8) =175836809388
External references
- oeis: A266570