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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.

A189651 Number of 3Xn array permutations with each element moving zero or one space horizontally, diagonally or antidiagonally.

Table of values

n a(n)
1 1
2 32
3 263
4 4277
5 55440
6 799069
7 11047585
8 155610272
9 2174615543
10 30495310793
11 427003730560
12 5982947971505
13 83805935210153
14 1174054970088496
15 16446690057231391
16 230398085842470229
17 3227563109360717136

List of values

[1, 32, 263, 4277, 55440, 799069, 11047585, 155610272, 2174615543, 30495310793, 427003730560, 5982947971505, 83805935210153, 1174054970088496, 16446690057231391, 230398085842470229, 3227563109360717136]

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

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