Number of 3 X n 0..1 arrays with new values 0..1 introduced in row major order and no element equal to more than one of its immediate leftward or upward or right-upward antidiagonal neighbors.
A208638
Number of 3 X n 0..1 arrays with new values 0..1 introduced in row major order and no element equal to more than one of its immediate leftward or upward or right-upward antidiagonal neighbors.
Terms
- a(0) =4a(1) =13a(2) =32a(3) =71a(4) =150a(5) =309a(6) =628a(7) =1267a(8) =2546a(9) =5105a(10) =10224a(11) =20463a(12) =40942a(13) =81901a(14) =163820a(15) =327659a(16) =655338a(17) =1310697a(18) =2621416a(19) =5242855a(20) =10485734a(21) =20971493a(22) =41943012a(23) =83886051a(24) =167772130a(25) =335544289a(26) =671088608a(27) =1342177247a(28) =2684354526a(29) =5368709085
External references
- oeis: A208638