A321037 - cp's OEIS frontend

A321037 Number of words of length 3n such that all letters of the septenary alphabet occur at least once and are introduced in ascending order and which can be built by repeatedly inserting triples of identical letters into the initially empty word.

n	a(n)
7	7752
8	942172
9	69858360
10	4110110550
11	211675627240
12	10018481786544
13	448004505210535
14	19256258184412314
15	804574034878107648
16	32931600573236529164
17	1327621591399983233480
18	52924527085674622431690
19	2092267882428782767625532
20	82204203906811813227807616

[7752, 942172, 69858360, 4110110550, 211675627240, 10018481786544, 448004505210535, 19256258184412314, 804574034878107648, 32931600573236529164, 1327621591399983233480, 52924527085674622431690, 2092267882428782767625532, 82204203906811813227807616]

cp's OEIS Frontend

A321037 Number of words of length 3n such that all letters of the septenary alphabet occur at least once and are introduced in ascending order and which can be built by repeatedly inserting triples of identical letters into the initially empty word.

Table of values

List of values