Number of 3Xn arrays containing n copies of 0..3-1 with no element 1 greater than its north neighbor modulo 3 and the upper left element equal to 0.
A266456
Number of 3Xn arrays containing n copies of 0..3-1 with no element 1 greater than its north neighbor modulo 3 and the upper left element equal to 0.
Terms
- a(0) =1a(1) =5a(2) =39a(3) =357a(4) =3471a(5) =35003a(6) =362265a(7) =3821877a(8) =40918431a(9) =443234475a(10) =4847042025a(11) =53425329675a(12) =592800026625
External references
- oeis: A266456