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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.

A202664 T(n,k)=Number of -k..k arrays of n elements with first through fourth differences also in -k..k.

Table of values

n a(n)
1 3
2 5
3 7
4 7
5 19
6 13
7 9
8 37
9 57
10 19
11 11
12 61
13 153
14 127
15 19
16 13
17 91
18 323
19 475
20 213
21 23
22 15
23 127
24 587
25 1279
26 1101
27 363
28 23
29 17
30 169
31 967
32 2833
33 3785
34 2591
35 613
36 23
37 19
38 217
39 1483
40 5509
41 10205
42 11413
43 6055
44 1055
45 23
46 21
47 271
48 2157
49 9739
50 23425
51 37505
52 34171
53 14199
54 1815

List of values

[3, 5, 7, 7, 19, 13, 9, 37, 57, 19, 11, 61, 153, 127, 19, 13, 91, 323, 475, 213, 23, 15, 127, 587, 1279, 1101, 363, 23, 17, 169, 967, 2833, 3785, 2591, 613, 23, 19, 217, 1483, 5509, 10205, 11413, 6055, 1055, 23, 21, 271, 2157, 9739, 23425, 37505, 34171, 14199, 1815]