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.

A056558 Third tetrahedral coordinate, i.e., tetrahedron with T(t,n,k)=k; succession of growing finite triangles with increasing values towards bottom right.

Table of values

n a(n)
0 0
1 0
2 0
3 1
4 0
5 0
6 1
7 0
8 1
9 2
10 0
11 0
12 1
13 0
14 1
15 2
16 0
17 1
18 2
19 3
20 0
21 0
22 1
23 0
24 1
25 2
26 0
27 1
28 2
29 3
30 0
31 1
32 2
33 3
34 4
35 0
36 0
37 1
38 0
39 1
40 2
41 0
42 1
43 2
44 3
45 0
46 1
47 2
48 3
49 4
50 0
51 1
52 2
53 3
54 4
55 5
56 0
57 0
58 1
59 0
60 1
61 2
62 0
63 1
64 2
65 3
66 0
67 1
68 2
69 3
70 4
71 0
72 1
73 2
74 3
75 4
76 5
77 0
78 1
79 2
80 3
81 4
82 5
83 6
84 0
85 0
86 1
87 0
88 1
89 2
90 0
91 1
92 2
93 3
94 0
95 1
96 2
97 3
98 4
99 0
100 1
101 2
102 3
103 4
104 5

List of values

[0, 0, 0, 1, 0, 0, 1, 0, 1, 2, 0, 0, 1, 0, 1, 2, 0, 1, 2, 3, 0, 0, 1, 0, 1, 2, 0, 1, 2, 3, 0, 1, 2, 3, 4, 0, 0, 1, 0, 1, 2, 0, 1, 2, 3, 0, 1, 2, 3, 4, 0, 1, 2, 3, 4, 5, 0, 0, 1, 0, 1, 2, 0, 1, 2, 3, 0, 1, 2, 3, 4, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 6, 0, 0, 1, 0, 1, 2, 0, 1, 2, 3, 0, 1, 2, 3, 4, 0, 1, 2, 3, 4, 5]