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.

A221509 Number of 3Xn arrays of occupancy after each element moves to some horizontal, diagonal or antidiagonal neighbor, without consecutive moves in the same direction.

Table of values

n a(n)
1 0
2 64
3 664
4 31663
5 730874
6 22664752
7 617892584
8 17782943460
9 499912745268
10 14194927933912
11 401323009766448
12 11367289765226164
13 321716709992052606
14 9108319376609834007
15 257833317722010551358
16 7299063007433073641077

List of values

[0, 64, 664, 31663, 730874, 22664752, 617892584, 17782943460, 499912745268, 14194927933912, 401323009766448, 11367289765226164, 321716709992052606, 9108319376609834007, 257833317722010551358, 7299063007433073641077]

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

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