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.

A343421 Number of Dean words of length n, i.e., squarefree reduced words over {0,1,2,3}.

Table of values

n a(n)
1 4
2 8
3 16
4 24
5 40
6 64
7 104
8 144
9 216
10 328
11 496
12 720
13 1072
14 1584
15 2344
16 3384
17 4952
18 7264
19 10632
20 15504
21 22656
22 33136
23 48488
24 70592
25 103032
26 150352
27 219400
28 319816
29 466664
30 680872
31 993440
32 1447952
33 2111448
34 3079464
35 4491216
36 6548936
37 9550728
38 13927840
39 20311168

List of values

[4, 8, 16, 24, 40, 64, 104, 144, 216, 328, 496, 720, 1072, 1584, 2344, 3384, 4952, 7264, 10632, 15504, 22656, 33136, 48488, 70592, 103032, 150352, 219400, 319816, 466664, 680872, 993440, 1447952, 2111448, 3079464, 4491216, 6548936, 9550728, 13927840, 20311168]