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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.

A158206 Number of irreducible numerical semigroups with Frobenius number n; that is, irreducible numerical semigroups for which the largest integer not belonging to them is n.

Table of values

n a(n)
1 1
2 1
3 1
4 1
5 2
6 1
7 3
8 2
9 3
10 3
11 6
12 2
13 8
14 6
15 7
16 7
17 15
18 7
19 20
20 11
21 18
22 20
23 36
24 14
25 44
26 35
27 45
28 37
29 83
30 36
31 109
32 70
33 101
34 106
35 174
36 77
37 246
38 182
39 227

List of values

[1, 1, 1, 1, 2, 1, 3, 2, 3, 3, 6, 2, 8, 6, 7, 7, 15, 7, 20, 11, 18, 20, 36, 14, 44, 35, 45, 37, 83, 36, 109, 70, 101, 106, 174, 77, 246, 182, 227]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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