A258499 - cp's OEIS frontend

A258499 Number of words of length 4n such that all letters of the n-ary alphabet occur at least once and are introduced in ascending order and which can be built by repeatedly inserting doublets into the initially empty word.

n	a(n)
0	1
1	1
2	34
3	3509
4	657370
5	182587701
6	67773956250
7	31600247019120
8	17769492060922914
9	11710509049983422030
10	8855064908059488718600
11	7558849413204728468703991
12	7190781941414575290014093320
13	7544364858457252265315311530675
14	8654711454787575656983217747533920

[1, 1, 34, 3509, 657370, 182587701, 67773956250, 31600247019120, 17769492060922914, 11710509049983422030, 8855064908059488718600, 7558849413204728468703991, 7190781941414575290014093320, 7544364858457252265315311530675, 8654711454787575656983217747533920]

cp's OEIS Frontend

A258499 Number of words of length 4n such that all letters of the n-ary alphabet occur at least once and are introduced in ascending order and which can be built by repeatedly inserting doublets into the initially empty word.

Table of values

List of values