Number of 4 X n 0..2 arrays with no element equal to any value at offset (-2,-1) (-1,0) or (-1,1) and new values introduced in order 0..2.
A275184
Number of 4 X n 0..2 arrays with no element equal to any value at offset (-2,-1) (-1,0) or (-1,1) and new values introduced in order 0..2.
Terms
- a(0) =4a(1) =12a(2) =41a(3) =141a(4) =482a(5) =1651a(6) =5653a(7) =19356a(8) =66277a(9) =226937a(10) =777050a(11) =2660679a(12) =9110369a(13) =31194604a(14) =106812721a(15) =365734965a(16) =1252304626a(17) =4287987275a(18) =14682397949a(19) =50273658876a(20) =172140871373a(21) =589423572097
External references
- oeis: A275184