Number of defective 3-colorings of a 2 X n 0..2 array connected horizontally and antidiagonally with exactly one mistake, and colors introduced in row-major 0..2 order.
A229587
Number of defective 3-colorings of a 2 X n 0..2 array connected horizontally and antidiagonally with exactly one mistake, and colors introduced in row-major 0..2 order.
Terms
- a(0) =0a(1) =6a(2) =28a(3) =116a(4) =444a(5) =1620a(6) =5724a(7) =19764a(8) =67068a(9) =224532a(10) =743580a(11) =2440692a(12) =7951932a(13) =25745364a(14) =82904796a(15) =265720500a(16) =848179836a(17) =2697594516a(18) =8551948572a(19) =27033340788a(20) =85232507580a(21) =268094978388a(22) =841477302108
External references
- oeis: A229587