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.

A221822 Number of nX3 arrays of occupancy after each element stays put or moves to some horizontal or vertical neighbor, without consecutive moves in the same direction.

Table of values

n a(n)
1 6
2 252
3 6711
4 190756
5 5374720
6 151592441
7 4274867564
8 120554575328
9 3399703708400
10 95873611077468
11 2703690754567558
12 76245627705373885
13 2150170395738132532
14 60636036995518426808
15 1709970985328543058485

List of values

[6, 252, 6711, 190756, 5374720, 151592441, 4274867564, 120554575328, 3399703708400, 95873611077468, 2703690754567558, 76245627705373885, 2150170395738132532, 60636036995518426808, 1709970985328543058485]

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

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