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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.

A100229 Triangle, read by rows, of the coefficients of [x^k] in G100228(x)^n such that the row sums are 4^n-1 for n>0, where G100228(x) is the g.f. of A100228.

Table of values

n a(n)
0 1
1 1
2 2
3 1
4 4
5 10
6 1
7 6
8 21
9 35
10 1
11 8
12 36
13 92
14 118
15 1
16 10
17 55
18 185
19 380
20 392
21 1
22 12
23 78
24 322
25 879
26 1506
27 1297
28 1
29 14
30 105
31 511
32 1715
33 3948
34 5803
35 4286
36 1
37 16
38 136
39 760
40 3004
41 8536
42 17020
43 21904
44 14158
45 1
46 18
47 171
48 1077
49 4878
50 16344
51 40395
52 71109
53 81387
54 46763

List of values

[1, 1, 2, 1, 4, 10, 1, 6, 21, 35, 1, 8, 36, 92, 118, 1, 10, 55, 185, 380, 392, 1, 12, 78, 322, 879, 1506, 1297, 1, 14, 105, 511, 1715, 3948, 5803, 4286, 1, 16, 136, 760, 3004, 8536, 17020, 21904, 14158, 1, 18, 171, 1077, 4878, 16344, 40395, 71109, 81387, 46763]