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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.

A121197 Consider the tiling of the plane with squares of two different sizes as in Fig. 2.4.2(g) of Grünbaum and Shephard, p. 74. a(n) is the number of connected figures that can be formed on this tiling, from any n squares.

Table of values

n a(n)
1 2
2 2
3 8
4 34
5 158
6 777
7 4006
8 21224
9 114348
10 624222
11 3441050
12 19121530
13 106957272

List of values

[2, 2, 8, 34, 158, 777, 4006, 21224, 114348, 624222, 3441050, 19121530, 106957272]

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

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