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.

A199642 Number of nX3 0..2 arrays with values 0..2 introduced in row major order and each element equal to one or two horizontal and vertical neighbors.

Table of values

n a(n)
1 1
2 13
3 112
4 1265
5 12748
6 134748
7 1396083
8 14584050
9 151837464
10 1582988477
11 16494233432
12 171904221068
13 1791430664487
14 18669394073270
15 194560012081184
16 2027588187779377
17 21130256645906468
18 220206564513115724

List of values

[1, 13, 112, 1265, 12748, 134748, 1396083, 14584050, 151837464, 1582988477, 16494233432, 171904221068, 1791430664487, 18669394073270, 194560012081184, 2027588187779377, 21130256645906468, 220206564513115724]

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

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