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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.

A086832 Number of ways to tile an n X n board having a black border with the following 1 X 1 tiles: bbbb, bbww, wbbw, bwwb, wwbb, where the colors are read clockwise around each tile.

Table of values

n a(n)
1 1
2 2
3 5
4 36
5 324
6 7041
7 233265
8 16038658
9 1884307184
10 426645198097
11 173238487743952

List of values

[1, 2, 5, 36, 324, 7041, 233265, 16038658, 1884307184, 426645198097, 173238487743952]

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

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