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.

A239662 Triangle read by rows: T(n,k), n>=1, k>=1, in which column k lists the numbers A017113 interleaved with k-1 zeros, and the first element of column k is in row k(k+1)/2.

Table of values

n a(n)
1 4
2 12
3 20
4 4
5 28
6 0
7 36
8 12
9 44
10 0
11 4
12 52
13 20
14 0
15 60
16 0
17 0
18 68
19 28
20 12
21 76
22 0
23 0
24 4
25 84
26 36
27 0
28 0
29 92
30 0
31 20
32 0
33 100
34 44
35 0
36 0
37 108
38 0
39 0
40 12
41 116
42 52
43 28
44 0
45 4
46 124
47 0
48 0
49 0
50 0
51 132
52 60
53 0
54 0
55 0
56 140
57 0
58 36
59 20
60 0
61 148
62 68
63 0
64 0
65 0
66 156
67 0
68 0
69 0
70 12
71 164
72 76
73 44
74 0
75 0
76 4
77 172
78 0
79 0
80 28
81 0
82 0
83 180
84 84
85 0
86 0
87 0
88 0
89 188
90 0
91 52
92 0
93 0
94 0

List of values

[4, 12, 20, 4, 28, 0, 36, 12, 44, 0, 4, 52, 20, 0, 60, 0, 0, 68, 28, 12, 76, 0, 0, 4, 84, 36, 0, 0, 92, 0, 20, 0, 100, 44, 0, 0, 108, 0, 0, 12, 116, 52, 28, 0, 4, 124, 0, 0, 0, 0, 132, 60, 0, 0, 0, 140, 0, 36, 20, 0, 148, 68, 0, 0, 0, 156, 0, 0, 0, 12, 164, 76, 44, 0, 0, 4, 172, 0, 0, 28, 0, 0, 180, 84, 0, 0, 0, 0, 188, 0, 52, 0, 0, 0]