A218476 - cp's OEIS frontend

A218476 Number of 3n-length 6-ary words, either empty or beginning with the first letter of the alphabet, that can be built by repeatedly inserting triples of identical letters into the initially empty word.

n	a(n)
0	1
1	1
2	16
3	331
4	7746
5	195011
6	5153626
7	140995716
8	3958980906
9	113434797571
10	3303283462836
11	97478710394451
12	2908594804576416
13	87605427983818356
14	2659959016770389896
15	81330226479826092536
16	2501989790308939894026
17	77386492111973937031491
18	2405093253522796180052056

[1, 1, 16, 331, 7746, 195011, 5153626, 140995716, 3958980906, 113434797571, 3303283462836, 97478710394451, 2908594804576416, 87605427983818356, 2659959016770389896, 81330226479826092536, 2501989790308939894026, 77386492111973937031491, 2405093253522796180052056]

cp's OEIS Frontend

A218476 Number of 3n-length 6-ary words, either empty or beginning with the first letter of the alphabet, that can be built by repeatedly inserting triples of identical letters into the initially empty word.

Table of values

List of values