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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.

A302490 Fewest number of distinct prime factors in any product of a_1*a_2*...*a_t where n = a_1 < a_2 < ... < a_t = A006255(n) and the product is square.

Table of values

n a(n)
1 0
2 2
3 2
4 1
5 2
6 2
7 2
8 3
9 1
10 3
11 3
12 3
13 3
14 4
15 3
16 1
17 2
18 2
19 2
20 3
21 3
22 3
23 2
24 2
25 1
26 3
27 4
28 3
29 2
30 4
31 2
32 3
33 5
34 4
35 4
36 2
37 3
38 3
39 3
40 3
41 3
42 3
43 3
44 4
45 3
46 3
47 3
48 3
49 1
50 4
51 4
52 5
53 3
54 4
55 5
56 3
57 4

List of values

[0, 2, 2, 1, 2, 2, 2, 3, 1, 3, 3, 3, 3, 4, 3, 1, 2, 2, 2, 3, 3, 3, 2, 2, 1, 3, 4, 3, 2, 4, 2, 3, 5, 4, 4, 2, 3, 3, 3, 3, 3, 3, 3, 4, 3, 3, 3, 3, 1, 4, 4, 5, 3, 4, 5, 3, 4]

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

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