cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A213288 Number of 9-length words w over n-ary alphabet such that for every prefix z of w we have #(z,a_i) = 0 or #(z,a_i) >= #(z,a_j) for all j>i and #(z,a_i) counts the occurrences of the i-th letter in z.

Table of values

n a(n)
0 0
1 1
2 162
3 2074
4 13280
5 64924
6 273248
7 1050777
8 3754472
9 12602451
10 39598078
11 115470300
12 311272072
13 777274550
14 1808153452
15 3946185587
16 8137258032
17 15957939797
18 29935676058
19 53988338158
20 94013898576
21 158665898944
22 260355640952
23 416527654621
24 651260985944

List of values

[0, 1, 162, 2074, 13280, 64924, 273248, 1050777, 3754472, 12602451, 39598078, 115470300, 311272072, 777274550, 1808153452, 3946185587, 8137258032, 15957939797, 29935676058, 53988338158, 94013898576, 158665898944, 260355640952, 416527654621, 651260985944]