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.

A137740 Number of different strings of length n+5 obtained from "123...n" by iteratively duplicating any substring.

Table of values

n a(n)
1 1
2 32
3 138
4 348
5 700
6 1246
7 2050
8 3188
9 4749
10 6836
11 9567
12 13076
13 17514
14 23050
15 29872
16 38188
17 48227
18 60240
19 74501
20 91308
21 110984
22 133878
23 160366
24 190852
25 225769
26 265580
27 310779
28 361892
29 419478
30 484130
31 556476
32 637180
33 726943
34 826504
35 936641
36 1058172
37 1191956

List of values

[1, 32, 138, 348, 700, 1246, 2050, 3188, 4749, 6836, 9567, 13076, 17514, 23050, 29872, 38188, 48227, 60240, 74501, 91308, 110984, 133878, 160366, 190852, 225769, 265580, 310779, 361892, 419478, 484130, 556476, 637180, 726943, 826504, 936641, 1058172, 1191956]