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.

A221825 Number of nX3 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 16
3 202
4 2930
5 41618
6 592601
7 8434490
8 120053263
9 1708776751
10 24321871624
11 346185271087
12 4927426856495
13 70134512879660
14 998259343308353
15 14208720864088015
16 202239778618252032
17 2878579180120974241

List of values

[0, 16, 202, 2930, 41618, 592601, 8434490, 120053263, 1708776751, 24321871624, 346185271087, 4927426856495, 70134512879660, 998259343308353, 14208720864088015, 202239778618252032, 2878579180120974241]

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

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