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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.

A256042 Triangle read by rows: number of idempotent basis elements of rank k in partition monoid P_n.

Table of values

n a(n)
0 1
1 0
2 1
3 0
4 5
5 1
6 0
7 43
8 15
9 1
10 0
11 529
12 247
13 30
14 1
15 0
16 8451
17 4795
18 805
19 50
20 1
21 0
22 167397
23 108871
24 22710
25 1985
26 75
27 1
28 0
29 3984807
30 2855279
31 697501
32 76790
33 4130
34 105
35 1
36 0
37 111319257
38 85458479
39 23520966
40 3070501
41 209930
42 7658
43 140
44 1
45 0
46 3583777723
47 2887069491
48 871103269
49 129732498
50 10604811
51 495054
52 13062
53 180
54 1

List of values

[1, 0, 1, 0, 5, 1, 0, 43, 15, 1, 0, 529, 247, 30, 1, 0, 8451, 4795, 805, 50, 1, 0, 167397, 108871, 22710, 1985, 75, 1, 0, 3984807, 2855279, 697501, 76790, 4130, 105, 1, 0, 111319257, 85458479, 23520966, 3070501, 209930, 7658, 140, 1, 0, 3583777723, 2887069491, 871103269, 129732498, 10604811, 495054, 13062, 180, 1]

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

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