Number of 4Xn arrays containing n copies of 0..4-1 with every element equal to or 1 greater than any northeast neighbor modulo 4 and the upper left element equal to 0.
A267837
Number of 4Xn arrays containing n copies of 0..4-1 with every element equal to or 1 greater than any northeast neighbor modulo 4 and the upper left element equal to 0.
Terms
- a(0) =6a(1) =54a(2) =924a(3) =19696a(4) =456052a(5) =11169884a(6) =284749896a(7) =7478180356a(8) =200946163564
External references
- oeis: A267837