Number of 4Xn arrays containing n copies of 0..4-1 with every element equal to or 1 greater than any northeast or northwest neighbors modulo 4 and the upper left element equal to 0.
A267023
Number of 4Xn arrays containing n copies of 0..4-1 with every element equal to or 1 greater than any northeast or northwest neighbors modulo 4 and the upper left element equal to 0.
Terms
- a(0) =6a(1) =8a(2) =21a(3) =137a(4) =759a(5) =4835a(6) =31591a(7) =216460a(8) =1516047a(9) =10864196a(10) =79437844a(11) =590119523a(12) =4453596825a(13) =34028591249a(14) =263304258843
External references
- oeis: A267023