Number of 4Xn arrays containing n copies of 0..4-1 with every element equal to or 1 greater than any southwest or northwest neighbors modulo 4 and the upper left element equal to 0.
A267284
Number of 4Xn arrays containing n copies of 0..4-1 with every element equal to or 1 greater than any southwest or northwest neighbors modulo 4 and the upper left element equal to 0.
Terms
- a(0) =6a(1) =5a(2) =24a(3) =137a(4) =1138a(5) =12214a(6) =104742a(7) =741057a(8) =5022782a(9) =35540696a(10) =271621650a(11) =2252475421a(12) =19535278570a(13) =168510129798
External references
- oeis: A267284