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.

A226348 Number of ways to tile a fixed 3 x n square grid with 1 x 1, 2 x 2, and axially-oriented 1 x 2 tiles.

Table of values

n a(n)
1 1
2 12
3 39
4 233
5 1018
6 5191
7 24471
8 119998
9 576801
10 2800623
11 13529080
12 65524257
13 316934081
14 1533990732
15 7422176263
16 35918097881
17 173803358634
18 841050066135
19 4069827389207
20 19694046692606
21 95299690379681

List of values

[1, 12, 39, 233, 1018, 5191, 24471, 119998, 576801, 2800623, 13529080, 65524257, 316934081, 1533990732, 7422176263, 35918097881, 173803358634, 841050066135, 4069827389207, 19694046692606, 95299690379681]

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

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