Number of nX2 arrays containing 2 copies of 0..n-1 with every element equal to or 1 greater than any northeast neighbor modulo n and the upper left element equal to 0.
A267832
Number of nX2 arrays containing 2 copies of 0..n-1 with every element equal to or 1 greater than any northeast neighbor modulo n and the upper left element equal to 0.
Terms
- a(0) =1a(1) =3a(2) =11a(3) =54a(4) =330a(5) =2430a(6) =20970a(7) =207900a(8) =2331000a(9) =29189160a(10) =404044200a(11) =6129723600a(12) =101181603600
External references
- oeis: A267832