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.

A287213 Number T(n,k) of set partitions of [n] such that the maximal absolute difference between consecutive elements within a block equals k; triangle T(n,k), n>=0, 0<=k<=max(n-1,0), read by rows.

Table of values

n a(n)
0 1
1 1
2 1
3 1
4 1
5 3
6 1
7 1
8 7
9 5
10 2
11 1
12 15
13 18
14 13
15 5
16 1
17 31
18 57
19 61
20 38
21 15
22 1
23 63
24 169
25 248
26 215
27 129
28 52
29 1
30 127
31 482
32 935
33 1061
34 836
35 495
36 203
37 1
38 255
39 1341
40 3368
41 4835
42 4789
43 3573
44 2108
45 877
46 1
47 511
48 3669
49 11777
50 20973
51 25430
52 22986
53 16657
54 9831
55 4140

List of values

[1, 1, 1, 1, 1, 3, 1, 1, 7, 5, 2, 1, 15, 18, 13, 5, 1, 31, 57, 61, 38, 15, 1, 63, 169, 248, 215, 129, 52, 1, 127, 482, 935, 1061, 836, 495, 203, 1, 255, 1341, 3368, 4835, 4789, 3573, 2108, 877, 1, 511, 3669, 11777, 20973, 25430, 22986, 16657, 9831, 4140]