Number of 4Xn arrays containing n copies of 0..4-1 with every element equal to or 1 greater than any north or southwest neighbors modulo 4 and the upper left element equal to 0.
A267656
Number of 4Xn arrays containing n copies of 0..4-1 with every element equal to or 1 greater than any north or southwest neighbors modulo 4 and the upper left element equal to 0.
Terms
- a(0) =1a(1) =3a(2) =23a(3) =123a(4) =657a(5) =4765a(6) =36055a(7) =256836a(8) =1888443a(9) =14723754a(10) =115956869a(11) =909264975a(12) =7225892789a(13) =58392353909a(14) =474838300847
External references
- oeis: A267656