Number of 4Xn arrays containing n copies of 0..4-1 with no element 1 greater than its north, west, southeast or southwest neighbor modulo 4 and the upper left element equal to 0.
A266633
Number of 4Xn arrays containing n copies of 0..4-1 with no element 1 greater than its north, west, southeast or southwest neighbor modulo 4 and the upper left element equal to 0.
Terms
- a(0) =2a(1) =13a(2) =64a(3) =438a(4) =3265a(5) =27626a(6) =266481a(7) =2864371a(8) =35114131a(9) =464035512a(10) =6667852532a(11) =98820516955
External references
- oeis: A266633