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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.

A205746 Number of (n+1)X(n+1) 0..2 arrays with every 2X2 subblock having the same number of equal edges as its horizontal neighbors and a different number from its vertical neighbors, and new values 0..2 introduced in row major order.

Table of values

n a(n)
1 14
2 284
3 8926
4 383290
5 28155907
6 2917623614
7 528507252157
8 138111752968498
9 64850139038419406
10 44000031319042068352

List of values

[14, 284, 8926, 383290, 28155907, 2917623614, 528507252157, 138111752968498, 64850139038419406, 44000031319042068352]

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

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