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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.

A047881 a(n) = Sum_{h=0..n, k=0..n} T(h,k), array T counting knights' moves as in A049604.

Table of values

n a(n)
0 0
1 10
2 20
3 38
4 62
5 100
6 150
7 220
8 302
9 410
10 536
11 692
12 868
13 1080
14 1316
15 1594
16 1898
17 2248
18 2630
19 3064
20 3530
21 4054
22 4616
23 5240
24 5904
25 6636
26 7412
27 8262
28 9158
29 10132
30 11158
31 12268
32 13430
33 14682
34 15992
35 17396
36 18860
37 20424
38 22052

List of values

[0, 10, 20, 38, 62, 100, 150, 220, 302, 410, 536, 692, 868, 1080, 1316, 1594, 1898, 2248, 2630, 3064, 3530, 4054, 4616, 5240, 5904, 6636, 7412, 8262, 9158, 10132, 11158, 12268, 13430, 14682, 15992, 17396, 18860, 20424, 22052]

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

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