cp's OEIS Frontend

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.

A187173 Number of 3-step left-handed knight's tours (moves only out two, left one) on an n X n board summed over all starting positions.

Table of values

n a(n)
1 0
2 0
3 0
4 16
5 60
6 128
7 220
8 336
9 476
10 640
11 828
12 1040
13 1276
14 1536
15 1820
16 2128
17 2460
18 2816
19 3196
20 3600
21 4028
22 4480
23 4956
24 5456
25 5980
26 6528
27 7100
28 7696
29 8316
30 8960
31 9628
32 10320
33 11036
34 11776
35 12540
36 13328
37 14140
38 14976
39 15836
40 16720
41 17628
42 18560
43 19516
44 20496

List of values

[0, 0, 0, 16, 60, 128, 220, 336, 476, 640, 828, 1040, 1276, 1536, 1820, 2128, 2460, 2816, 3196, 3600, 4028, 4480, 4956, 5456, 5980, 6528, 7100, 7696, 8316, 8960, 9628, 10320, 11036, 11776, 12540, 13328, 14140, 14976, 15836, 16720, 17628, 18560, 19516, 20496]