A216461 - cp's OEIS frontend

A216461 Number of horizontal, diagonal and antidiagonal neighbor colorings of the even squares of a 3Xn array with new integer colors introduced in row major order.

n	a(n)
1	2
2	2
3	7
4	15
5	203
6	716
7	17733
8	83440
9	3137543
10	18171918
11	942426468
12	6423127757
13	433245459699
14	3376465219485
15	284615058572536
16	2486327138729353
17	254421641605158901
18	2454996141671330713
19	298288744434946125073

[2, 2, 7, 15, 203, 716, 17733, 83440, 3137543, 18171918, 942426468, 6423127757, 433245459699, 3376465219485, 284615058572536, 2486327138729353, 254421641605158901, 2454996141671330713, 298288744434946125073]

cp's OEIS Frontend

A216461 Number of horizontal, diagonal and antidiagonal neighbor colorings of the even squares of a 3Xn array with new integer colors introduced in row major order.

Table of values

List of values