Number of 4Xn arrays containing n copies of 0..4-1 with every element equal to or 1 greater than any north, southwest or northwest neighbors modulo 4 and the upper left element equal to 0.
A267202
Number of 4Xn arrays containing n copies of 0..4-1 with every element equal to or 1 greater than any north, southwest or northwest neighbors modulo 4 and the upper left element equal to 0.
Terms
- a(0) =1a(1) =0a(2) =0a(3) =1a(4) =5a(5) =23a(6) =79a(7) =178a(8) =336a(9) =835a(10) =3128a(11) =14040a(12) =59621a(13) =222502a(14) =738006a(15) =2300988a(16) =7269138a(17) =24626806a(18) =89676159a(19) =336858214a(20) =1251319303a(21) =4507801679a(22) =15792191315a(23) =54688767852a(24) =190846159644a(25) =679049839287
External references
- oeis: A267202