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.

A213286 Number of 7-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 46
3 367
4 1805
5 7280
6 25781
7 83916
8 250062
9 676155
10 1662160
11 3748261
12 7839811
13 15370082
14 28505855
15 50400890
16 85502316
17 139914981
18 221828802
19 342014155
20 514390345
21 756672196
22 1091099801
23 1545256472
24 2152979930
25 2955371775
26 4001910276
27 5351671521

List of values

[0, 1, 46, 367, 1805, 7280, 25781, 83916, 250062, 676155, 1662160, 3748261, 7839811, 15370082, 28505855, 50400890, 85502316, 139914981, 221828802, 342014155, 514390345, 756672196, 1091099801, 1545256472, 2152979930, 2955371775, 4001910276, 5351671521]