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.

A322284 Number of nonequivalent ways to place n nonattacking kings on a 2 X 2n chessboard under all symmetry operations of the rectangle.

Table of values

n a(n)
1 1
2 4
3 8
4 22
5 48
6 116
7 256
8 584
9 1280
10 2832
11 6144
12 13344
13 28672
14 61504
15 131072
16 278656
17 589824
18 1245440
19 2621440
20 5505536
21 11534336
22 24118272
23 50331648
24 104859648
25 218103808
26 452988928
27 939524096
28 1946165248
29 4026531840
30 8321515520
31 17179869184
32 35433512960

List of values

[1, 4, 8, 22, 48, 116, 256, 584, 1280, 2832, 6144, 13344, 28672, 61504, 131072, 278656, 589824, 1245440, 2621440, 5505536, 11534336, 24118272, 50331648, 104859648, 218103808, 452988928, 939524096, 1946165248, 4026531840, 8321515520, 17179869184, 35433512960]

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

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