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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.

A202798 Number of nX4 binary arrays with every one adjacent to another one horizontally or vertically.

Table of values

n a(n)
1 7
2 126
3 1718
4 22946
5 311144
6 4217066
7 57127796
8 773948962
9 10485233258
10 142050385280
11 1924452482144
12 26071860295098
13 353213105139604
14 4785216541174944
15 64828561353680056
16 878276318748587482

List of values

[7, 126, 1718, 22946, 311144, 4217066, 57127796, 773948962, 10485233258, 142050385280, 1924452482144, 26071860295098, 353213105139604, 4785216541174944, 64828561353680056, 878276318748587482]

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

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