A218480 - cp's OEIS frontend

A218480 Number of 3n-length 10-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	28
3	1027
4	42850
5	1929043
6	91320022
7	4480436836
8	225785025802
9	11617042380355
10	607729841261560
11	32227411217273515
12	1728444323307664720
13	93593058046710649012
14	5109705135623767855960
15	280954986758729989837624
16	15544627425243191634814666

[1, 1, 28, 1027, 42850, 1929043, 91320022, 4480436836, 225785025802, 11617042380355, 607729841261560, 32227411217273515, 1728444323307664720, 93593058046710649012, 5109705135623767855960, 280954986758729989837624, 15544627425243191634814666]

cp's OEIS Frontend

A218480 Number of 3n-length 10-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