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.

A203373 Number of (n+1) X 4 0..1 arrays with every 2 X 2 subblock having equal diagonal elements or equal antidiagonal elements.

Table of values

n a(n)
1 108
2 748
3 5208
4 36300
5 253068
6 1764360
7 12301020
8 85762188
9 597930552
10 4168748268
11 29064349260
12 202635502632
13 1412766774396
14 9849754525644
15 68672102130648
16 478779201937548
17 3338029812632076
18 23272612897409352

List of values

[108, 748, 5208, 36300, 253068, 1764360, 12301020, 85762188, 597930552, 4168748268, 29064349260, 202635502632, 1412766774396, 9849754525644, 68672102130648, 478779201937548, 3338029812632076, 23272612897409352]

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

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