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.

A228814 Triangle read by rows T(n,k), n>=1, k>=1, in which column k starts in row A002620(k+1). If k is odd the column k lists j's interleaved with (k-1)/2 zeros, where j = (k+1)/2. Otherwise, if k is even the column k lists the positive integers but starting from k/2+1, interleaved with (k-2)/2 zeros.

Table of values

n a(n)
1 1
2 1
3 2
4 1
5 3
6 1
7 4
8 2
9 1
10 5
11 0
12 1
13 6
14 2
15 3
16 1
17 7
18 0
19 0
20 1
21 8
22 2
23 4
24 1
25 9
26 0
27 0
28 3
29 1
30 10
31 2
32 5
33 0
34 1
35 11
36 0
37 0
38 0
39 1
40 12
41 2
42 6
43 3
44 4
45 1
46 13
47 0
48 0
49 0
50 0
51 1
52 14
53 2
54 7
55 0
56 0
57 1
58 15
59 0
60 0
61 3
62 5
63 1
64 16
65 2
66 8
67 0
68 0
69 4
70 1
71 17
72 0
73 0
74 0
75 0
76 0
77 1
78 18
79 2
80 9
81 3
82 6
83 0

List of values

[1, 1, 2, 1, 3, 1, 4, 2, 1, 5, 0, 1, 6, 2, 3, 1, 7, 0, 0, 1, 8, 2, 4, 1, 9, 0, 0, 3, 1, 10, 2, 5, 0, 1, 11, 0, 0, 0, 1, 12, 2, 6, 3, 4, 1, 13, 0, 0, 0, 0, 1, 14, 2, 7, 0, 0, 1, 15, 0, 0, 3, 5, 1, 16, 2, 8, 0, 0, 4, 1, 17, 0, 0, 0, 0, 0, 1, 18, 2, 9, 3, 6, 0]