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.

A309106 Triangular array T(m,n): number of sequences of n residues modulo m such that no nonempty subsequence sums to zero, for m>=1, n=0..m-1.

Table of values

n a(n)
1 1
2 1
3 1
4 1
5 2
6 2
7 1
8 3
9 6
10 2
11 1
12 4
13 12
14 16
15 4
16 1
17 5
18 20
19 44
20 10
21 2
22 1
23 6
24 30
25 96
26 90
27 36
28 6
29 1
30 7
31 42
32 174
33 240
34 84
35 28
36 4
37 1
38 8
39 56
40 288
41 690
42 336
43 168
44 48
45 6
46 1
47 9
48 72
49 440
50 1344
51 984
52 336
53 144
54 36
55 4
56 1
57 10
58 90
59 640
60 2590
61 3060
62 2100
63 1200
64 450
65 100
66 10

List of values

[1, 1, 1, 1, 2, 2, 1, 3, 6, 2, 1, 4, 12, 16, 4, 1, 5, 20, 44, 10, 2, 1, 6, 30, 96, 90, 36, 6, 1, 7, 42, 174, 240, 84, 28, 4, 1, 8, 56, 288, 690, 336, 168, 48, 6, 1, 9, 72, 440, 1344, 984, 336, 144, 36, 4, 1, 10, 90, 640, 2590, 3060, 2100, 1200, 450, 100, 10]