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.

A264946 Number of 3 X n arrays containing n copies of 0..3-1 with no equal horizontal neighbors and new values introduced sequentially from 0.

Table of values

n a(n)
1 1
2 8
3 56
4 332
5 2350
6 16108
7 114148
8 817280
9 5918424
10 43251920
11 318428920
12 2359455400
13 17577965926
14 131579085320
15 989014916960
16 7461197116280
17 56471149527616
18 428656384570808
19 3262347081071272
20 24887490475059512

List of values

[1, 8, 56, 332, 2350, 16108, 114148, 817280, 5918424, 43251920, 318428920, 2359455400, 17577965926, 131579085320, 989014916960, 7461197116280, 56471149527616, 428656384570808, 3262347081071272, 24887490475059512]

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

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