Number of 3Xn arrays containing n copies of 0..3-1 with no element 1 greater than its north or southwest neighbor modulo 3 and the upper left element equal to 0.
A266862
Number of 3Xn arrays containing n copies of 0..3-1 with no element 1 greater than its north or southwest neighbor modulo 3 and the upper left element equal to 0.
Terms
- a(0) =1a(1) =4a(2) =17a(3) =66a(4) =324a(5) =1565a(6) =7908a(7) =41440a(8) =219394a(9) =1181538a(10) =6433652a(11) =35322999a(12) =195435804a(13) =1087909500a(14) =6087937840a(15) =34225256140a(16) =193178201178
External references
- oeis: A266862