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.

A261835 Number A(n,k) of compositions of n into distinct parts where each part i is marked with a word of length i over a k-ary alphabet whose letters appear in alphabetical order; square array A(n,k), n>=0, k>=0, read by antidiagonals.

Table of values

n a(n)
0 1
1 1
2 0
3 1
4 1
5 0
6 1
7 2
8 1
9 0
10 1
11 3
12 3
13 3
14 0
15 1
16 4
17 6
18 16
19 3
20 0
21 1
22 5
23 10
24 46
25 21
26 5
27 0
28 1
29 6
30 15
31 100
32 75
33 50
34 11
35 0
36 1
37 7
38 21
39 185
40 195
41 231
42 205
43 13
44 0
45 1
46 8
47 28
48 308
49 420
50 736
51 1414
52 292
53 19
54 0
55 1
56 9
57 36
58 476
59 798
60 1876
61 6032
62 2376
63 587
64 27
65 0

List of values

[1, 1, 0, 1, 1, 0, 1, 2, 1, 0, 1, 3, 3, 3, 0, 1, 4, 6, 16, 3, 0, 1, 5, 10, 46, 21, 5, 0, 1, 6, 15, 100, 75, 50, 11, 0, 1, 7, 21, 185, 195, 231, 205, 13, 0, 1, 8, 28, 308, 420, 736, 1414, 292, 19, 0, 1, 9, 36, 476, 798, 1876, 6032, 2376, 587, 27, 0]