Number of 4Xn arrays containing n copies of 0..4-1 with no element 1 greater than its north or southwest neighbor modulo 4 and the upper left element equal to 0.
A266863
Number of 4Xn arrays containing n copies of 0..4-1 with no element 1 greater than its north or southwest neighbor modulo 4 and the upper left element equal to 0.
Terms
- a(0) =2a(1) =39a(2) =999a(3) =31501a(4) =1115170a(5) =41983402a(6) =1645807004a(7) =66428315332
External references
- oeis: A266863