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.

A212431 Triangle read by rows: row sums, right and left borders are the Bell sequence, or a shifted variant. See Comments for precise definition.

Table of values

n a(n)
0 1
1 1
2 1
3 2
4 1
5 2
6 5
7 3
8 2
9 5
10 15
11 9
12 8
13 5
14 15
15 52
16 31
17 28
18 25
19 15
20 52
21 203
22 121
23 108
24 100
25 90
26 52
27 203
28 877
29 523
30 466
31 425
32 405
33 364
34 203
35 877
36 4140
37 2469
38 2202
39 2000
40 1875
41 1820
42 1624
43 877
44 4140
45 21147
46 12611
47 11250
48 10230
49 9525
50 9100
51 8932
52 7893
53 4140
54 21147

List of values

[1, 1, 1, 2, 1, 2, 5, 3, 2, 5, 15, 9, 8, 5, 15, 52, 31, 28, 25, 15, 52, 203, 121, 108, 100, 90, 52, 203, 877, 523, 466, 425, 405, 364, 203, 877, 4140, 2469, 2202, 2000, 1875, 1820, 1624, 877, 4140, 21147, 12611, 11250, 10230, 9525, 9100, 8932, 7893, 4140, 21147]

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

Content is available under The OEIS End-User License Agreement.