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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.

A098500 Number of squares on infinite quarter chessboard at <=n knight moves from the corner.

Table of values

n a(n)
0 1
1 3
2 12
3 32
4 59
5 91
6 130
7 176
8 229
9 289
10 356
11 430
12 511
13 599
14 694
15 796
16 905
17 1021
18 1144
19 1274
20 1411
21 1555
22 1706
23 1864
24 2029
25 2201
26 2380
27 2566
28 2759
29 2959
30 3166
31 3380
32 3601
33 3829
34 4064
35 4306
36 4555
37 4811
38 5074
39 5344
40 5621
41 5905
42 6196
43 6494
44 6799
45 7111
46 7430

List of values

[1, 3, 12, 32, 59, 91, 130, 176, 229, 289, 356, 430, 511, 599, 694, 796, 905, 1021, 1144, 1274, 1411, 1555, 1706, 1864, 2029, 2201, 2380, 2566, 2759, 2959, 3166, 3380, 3601, 3829, 4064, 4306, 4555, 4811, 5074, 5344, 5621, 5905, 6196, 6494, 6799, 7111, 7430]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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