A208675 - cp's OEIS frontend

A208675 Number of words, either empty or beginning with the first letter of the ternary alphabet, where each letter of the alphabet occurs n times and letters of neighboring word positions are equal or neighbors in the alphabet.

n	a(n)
0	1
1	1
2	5
3	37
4	309
5	2751
6	25493
7	242845
8	2360501
9	23301307
10	232834755
11	2349638259
12	23905438725
13	244889453043
14	2523373849701
15	26132595017037
16	271826326839477
17	2838429951771795
18	29740725671232119
19	312573076392760183
20	3294144659048391059
21	34802392680979707121

[1, 1, 5, 37, 309, 2751, 25493, 242845, 2360501, 23301307, 232834755, 2349638259, 23905438725, 244889453043, 2523373849701, 26132595017037, 271826326839477, 2838429951771795, 29740725671232119, 312573076392760183, 3294144659048391059, 34802392680979707121]

cp's OEIS Frontend

A208675 Number of words, either empty or beginning with the first letter of the ternary alphabet, where each letter of the alphabet occurs n times and letters of neighboring word positions are equal or neighbors in the alphabet.

Table of values

List of values