Number of nX2 arrays containing 2 copies of 0..n-1 with no element 1 greater than its north, west or southwest neighbor modulo n and the upper left element equal to 0.
A266902
Number of nX2 arrays containing 2 copies of 0..n-1 with no element 1 greater than its north, west or southwest neighbor modulo n and the upper left element equal to 0.
Terms
- a(0) =1a(1) =0a(2) =1a(3) =13a(4) =331a(5) =17651a(6) =1386377a(7) =148410280a(8) =20588092054
External references
- oeis: A266902