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.

A255874 Triangular array T: T(n,k) = number of subset S of {1,2,...,n+1} such that |S| > 1 and max(S*) = k, where S* is the set {x(2)-x(1), x(3)-x(2), ..., x(h+1)-x(h)} when the elements of S are written as x(1) < x(2) < ... < x(h+1).

Table of values

n a(n)
1 1
2 3
3 1
4 6
5 4
6 1
7 10
8 11
9 4
10 1
11 15
12 25
13 12
14 4
15 1
16 21
17 51
18 31
19 12
20 4
21 1
22 28
23 97
24 73
25 32
26 12
27 4
28 1
29 36
30 176
31 162
32 79
33 32
34 12
35 4
36 1
37 45
38 309
39 345
40 185
41 80
42 32
43 12
44 4
45 1
46 55
47 530
48 713
49 418
50 191
51 80
52 32
53 12
54 4
55 1
56 66
57 894
58 1441
59 920
60 441
61 192
62 80
63 32
64 12
65 4
66 1

List of values

[1, 3, 1, 6, 4, 1, 10, 11, 4, 1, 15, 25, 12, 4, 1, 21, 51, 31, 12, 4, 1, 28, 97, 73, 32, 12, 4, 1, 36, 176, 162, 79, 32, 12, 4, 1, 45, 309, 345, 185, 80, 32, 12, 4, 1, 55, 530, 713, 418, 191, 80, 32, 12, 4, 1, 66, 894, 1441, 920, 441, 192, 80, 32, 12, 4, 1]