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.

A276451 Number of 2-orbits of the cyclic group C_4 for a bi-colored square n X n grid with n squares of one color.

Table of values

n a(n)
1 0
2 1
3 2
4 12
5 30
6 408
7 1012
8 17920
9 45600
10 1059380
11 2730756
12 78115884
13 203235032
14 6917206576
15 18113945256
16 714851008512
17 1881039165696
18 84449819514060
19 223049005408900
20 11225502116862880
21 29736777118603962
22 1658138369930988088
23 4403069737450280832

List of values

[0, 1, 2, 12, 30, 408, 1012, 17920, 45600, 1059380, 2730756, 78115884, 203235032, 6917206576, 18113945256, 714851008512, 1881039165696, 84449819514060, 223049005408900, 11225502116862880, 29736777118603962, 1658138369930988088, 4403069737450280832]

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

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