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.

A293521 Number of surviving (but not bifurcating) nodes at generation n in the binary tree of persistently squarefree numbers (see A293230).

Table of values

n a(n)
0 0
1 1
2 1
3 3
4 3
5 2
6 5
7 9
8 8
9 11
10 15
11 24
12 30
13 42
14 51
15 76
16 94
17 126
18 158
19 217
20 298
21 403
22 539
23 731
24 970
25 1305
26 1748
27 2322
28 3179
29 4225
30 5715
31 7596
32 10259
33 13731
34 18357
35 24771
36 33184
37 44448
38 59968
39 80764
40 107973
41 145638
42 195237
43 262446
44 352904
45 474964
46 637081
47 856232
48 1149966
49 1543986
50 2076534
51 2789516

List of values

[0, 1, 1, 3, 3, 2, 5, 9, 8, 11, 15, 24, 30, 42, 51, 76, 94, 126, 158, 217, 298, 403, 539, 731, 970, 1305, 1748, 2322, 3179, 4225, 5715, 7596, 10259, 13731, 18357, 24771, 33184, 44448, 59968, 80764, 107973, 145638, 195237, 262446, 352904, 474964, 637081, 856232, 1149966, 1543986, 2076534, 2789516]

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

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