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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.

A268652 G.f. satisfies: A(x,y) = 1 + x*y*A(x,y+1)^2.

Table of values

n a(n)
0 1
1 0
2 1
3 0
4 2
5 2
6 0
7 9
8 14
9 5
10 0
11 64
12 124
13 74
14 14
15 0
16 624
17 1388
18 1074
19 352
20 42
21 0
22 7736
23 18964
24 17292
25 7520
26 1588
27 132
28 0
29 116416
30 307088
31 314356
32 163728
33 46561
34 6946
35 429
36 0
37 2060808
38 5760704
39 6434394
40 3807910
41 1311172
42 266116
43 29786
44 1430
45 0
46 41952600
47 122980872
48 147159406
49 95921164
50 37846790
51 9373620
52 1438006
53 126008
54 4862
55 0
56 965497440
57 2945806672
58 3729264888
59 2623904244
60 1147995184
61 327833296
62 61731036
63 7455440
64 527900
65 16796
66 0

List of values

[1, 0, 1, 0, 2, 2, 0, 9, 14, 5, 0, 64, 124, 74, 14, 0, 624, 1388, 1074, 352, 42, 0, 7736, 18964, 17292, 7520, 1588, 132, 0, 116416, 307088, 314356, 163728, 46561, 6946, 429, 0, 2060808, 5760704, 6434394, 3807910, 1311172, 266116, 29786, 1430, 0, 41952600, 122980872, 147159406, 95921164, 37846790, 9373620, 1438006, 126008, 4862, 0, 965497440, 2945806672, 3729264888, 2623904244, 1147995184, 327833296, 61731036, 7455440, 527900, 16796, 0]

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