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.

A293440 First differences of A293230: how many more alive nodes there are in generation n+1 than in generation n in the binary tree of persistently squarefree numbers.

Table of values

n a(n)
0 1
1 1
2 2
3 2
4 2
5 3
6 3
7 4
8 7
9 9
10 14
11 17
12 18
13 30
14 37
15 53
16 68
17 82
18 116
19 149
20 201
21 289
22 390
23 510
24 701
25 921
26 1241
27 1682
28 2277
29 2990
30 4054
31 5489
32 7247
33 9778
34 13222
35 17684
36 23849
37 32146
38 42930
39 57828
40 77679
41 104443
42 140343
43 188387
44 253322
45 339990
46 456855
47 614187
48 825548
49 1108788
50 1489668

List of values

[1, 1, 2, 2, 2, 3, 3, 4, 7, 9, 14, 17, 18, 30, 37, 53, 68, 82, 116, 149, 201, 289, 390, 510, 701, 921, 1241, 1682, 2277, 2990, 4054, 5489, 7247, 9778, 13222, 17684, 23849, 32146, 42930, 57828, 77679, 104443, 140343, 188387, 253322, 339990, 456855, 614187, 825548, 1108788, 1489668]