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.

A256411 Triangle read by rows: T(n,k) (1 <= k <= n) = number of ascendingly generated semigroups of order n with k generators.

Table of values

n a(n)
1 1
2 2
3 8
4 3
5 37
6 113
7 4
8 145
9 1257
10 3492
11 5
12 452
13 9020
14 67394
15 183732
16 6
17 1374
18 60826
19 938194
20 6398792
21 17061118
22 7
23 3933
24 356023
25 30492722
26 466578957
27 3032145644
28 7743056064

List of values

[1, 2, 8, 3, 37, 113, 4, 145, 1257, 3492, 5, 452, 9020, 67394, 183732, 6, 1374, 60826, 938194, 6398792, 17061118, 7, 3933, 356023, 30492722, 466578957, 3032145644, 7743056064]