Number of 3Xn arrays containing n copies of 0..3-1 with no equal horizontal or antidiagonal neighbors and new values introduced sequentially from 0.
A265193
Number of 3Xn arrays containing n copies of 0..3-1 with no equal horizontal or antidiagonal neighbors and new values introduced sequentially from 0.
Terms
- a(0) =1a(1) =5a(2) =17a(3) =42a(4) =155a(5) =511a(6) =2023a(7) =7760a(8) =31395a(9) =127575a(10) =526459a(11) =2194344a(12) =9206121a(13) =38933281a(14) =165380299a(15) =706470350a(16) =3028761985a(17) =13037475319a(18) =56289258695a(19) =243772244956
External references
- oeis: A265193