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.

A260587 Number of distinct prime factors of A173426(n) = concatenation of (1, 2, ..., n, n-1, ..., 1).

Table of values

n a(n)
1 0
2 1
3 2
4 2
5 2
6 5
7 2
8 4
9 3
10 1
11 2
12 3
13 3
14 6
15 6
16 4
17 4
18 4
19 6
20 2
21 5
22 3
23 4
24 8
25 2
26 6
27 8
28 2
29 4
30 9
31 4
32 9
33 6
34 6
35 6
36 7
37 3
38 5
39 7
40 4
41 6
42 6
43 3
44 6

List of values

[0, 1, 2, 2, 2, 5, 2, 4, 3, 1, 2, 3, 3, 6, 6, 4, 4, 4, 6, 2, 5, 3, 4, 8, 2, 6, 8, 2, 4, 9, 4, 9, 6, 6, 6, 7, 3, 5, 7, 4, 6, 6, 3, 6]