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.

A189644 Number of n X 3 array permutations with each element moving zero or one space horizontally, diagonally or antidiagonally.

Table of values

n a(n)
1 3
2 33
3 263
4 2161
5 17655
6 144353
7 1180167
8 9648721
9 78885143
10 644942273
11 5272862503
12 43109407281
13 352450114615
14 2881530764193
15 23558566731847
16 192608065601041
17 1574708145738583
18 12874360876413313
19 105257071556189543

List of values

[3, 33, 263, 2161, 17655, 144353, 1180167, 9648721, 78885143, 644942273, 5272862503, 43109407281, 352450114615, 2881530764193, 23558566731847, 192608065601041, 1574708145738583, 12874360876413313, 105257071556189543]

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

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