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.

A187509 Number of 4-step S, E, and NW-moving king's tours on an n X n board summed over all starting positions.

Table of values

n a(n)
1 0
2 2
3 36
4 115
5 236
6 399
7 604
8 851
9 1140
10 1471
11 1844
12 2259
13 2716
14 3215
15 3756
16 4339
17 4964
18 5631
19 6340
20 7091
21 7884
22 8719
23 9596
24 10515
25 11476
26 12479
27 13524
28 14611
29 15740
30 16911
31 18124
32 19379
33 20676
34 22015
35 23396
36 24819
37 26284
38 27791
39 29340
40 30931
41 32564
42 34239

List of values

[0, 2, 36, 115, 236, 399, 604, 851, 1140, 1471, 1844, 2259, 2716, 3215, 3756, 4339, 4964, 5631, 6340, 7091, 7884, 8719, 9596, 10515, 11476, 12479, 13524, 14611, 15740, 16911, 18124, 19379, 20676, 22015, 23396, 24819, 26284, 27791, 29340, 30931, 32564, 34239]