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.

A081218 Greatest squarefree number not exceeding n-th prime power which is not prime.

Table of values

n a(n)
1 1
2 3
3 7
4 7
5 15
6 23
7 26
8 31
9 47
10 62
11 79
12 119
13 123
14 127
15 167
16 241
17 255
18 287
19 341
20 359
21 511
22 527
23 623
24 727
25 839
26 959
27 1023
28 1330
29 1367
30 1679
31 1847
32 2047
33 2186
34 2195
35 2207
36 2399
37 2807
38 3122
39 3478
40 3719
41 4094
42 4487
43 4911
44 5039
45 5327
46 6239
47 6559
48 6857
49 6887
50 7919

List of values

[1, 3, 7, 7, 15, 23, 26, 31, 47, 62, 79, 119, 123, 127, 167, 241, 255, 287, 341, 359, 511, 527, 623, 727, 839, 959, 1023, 1330, 1367, 1679, 1847, 2047, 2186, 2195, 2207, 2399, 2807, 3122, 3478, 3719, 4094, 4487, 4911, 5039, 5327, 6239, 6559, 6857, 6887, 7919]

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

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