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.

A221830 Number of 3Xn arrays of occupancy after each element moves to some horizontal, vertical or antidiagonal neighbor, without 2-loops or left turns.

Table of values

n a(n)
1 0
2 14
3 202
4 2879
5 40983
6 583419
7 8304016
8 118195328
9 1682332699
10 23945477164
11 340827864824
12 4851172222091
13 69049142818994
14 982810732310121
15 13988833113623959
16 199110007092542464
17 2834031588079597413

List of values

[0, 14, 202, 2879, 40983, 583419, 8304016, 118195328, 1682332699, 23945477164, 340827864824, 4851172222091, 69049142818994, 982810732310121, 13988833113623959, 199110007092542464, 2834031588079597413]

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

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