A229587 - cp's OEIS frontend

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.

n	a(n)
1	0
2	6
3	28
4	116
5	444
6	1620
7	5724
8	19764
9	67068
10	224532
11	743580
12	2440692
13	7951932
14	25745364
15	82904796
16	265720500
17	848179836
18	2697594516
19	8551948572
20	27033340788
21	85232507580
22	268094978388
23	841477302108
24	2636009007156
25	8242758323964

[0, 6, 28, 116, 444, 1620, 5724, 19764, 67068, 224532, 743580, 2440692, 7951932, 25745364, 82904796, 265720500, 848179836, 2697594516, 8551948572, 27033340788, 85232507580, 268094978388, 841477302108, 2636009007156, 8242758323964]

cp's OEIS Frontend

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.

Table of values

List of values