A229638 - cp's OEIS frontend

A229638 Number of defective 3-colorings of a 2 X n 0..2 array connected horizontally, diagonally and antidiagonally with exactly two mistakes, and colors introduced in row-major 0..2 order.

n	a(n)
1	0
2	6
3	40
4	122
5	488
6	1608
7	5392
8	17368
9	55232
10	172896
11	535296
12	1641376
13	4992896
14	15083648
15	45297408
16	135323008
17	402405376
18	1191699968
19	3516119040
20	10339711488
21	30313351168
22	88624646144
23	258445856768
24	751910639616
25	2182836600832

[0, 6, 40, 122, 488, 1608, 5392, 17368, 55232, 172896, 535296, 1641376, 4992896, 15083648, 45297408, 135323008, 402405376, 1191699968, 3516119040, 10339711488, 30313351168, 88624646144, 258445856768, 751910639616, 2182836600832]

cp's OEIS Frontend

A229638 Number of defective 3-colorings of a 2 X n 0..2 array connected horizontally, diagonally and antidiagonally with exactly two mistakes, and colors introduced in row-major 0..2 order.

Table of values

List of values