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.

A274896 Number of 4 X n 0..2 arrays with no element equal to any value at offset (0,-1) (-1,-1) or (-2,0) and new values introduced in order 0..2.

Table of values

n a(n)
1 6
2 14
3 38
4 104
5 290
6 815
7 2291
8 6434
9 18065
10 50729
11 142469
12 400121
13 1123718
14 3155882
15 8863073
16 24891350
17 69905726
18 196325636
19 551367590
20 1548479459
21 4348802339
22 12213324374
23 34300315505
24 96330172385
25 270536931545
26 759785117405

List of values

[6, 14, 38, 104, 290, 815, 2291, 6434, 18065, 50729, 142469, 400121, 1123718, 3155882, 8863073, 24891350, 69905726, 196325636, 551367590, 1548479459, 4348802339, 12213324374, 34300315505, 96330172385, 270536931545, 759785117405]

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

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