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.

A261777 Number of compositions of n where the (possibly scattered) maximal subsequence of part i with multiplicity j is marked with i words of length j over an n-ary alphabet whose letters appear in alphabetical order and all n letters occur exactly once in the composition.

Table of values

n a(n)
0 1
1 1
2 3
3 19
4 115
5 951
6 10281
7 116313
8 1436499
9 20203795
10 338834053
11 5824666893
12 108142092169
13 2118605140237
14 44375797806315
15 1039641056342619
16 25413053107195539
17 646983321301050147
18 17311013062443870681
19 481282277347815404745
20 13913039361920333694165

List of values

[1, 1, 3, 19, 115, 951, 10281, 116313, 1436499, 20203795, 338834053, 5824666893, 108142092169, 2118605140237, 44375797806315, 1039641056342619, 25413053107195539, 646983321301050147, 17311013062443870681, 481282277347815404745, 13913039361920333694165]