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.

A374031 a(n) = gcd(A276085(n), A328768(n)), where A276085 is the primorial base log-function, and A328768 is the first primorial based variant of arithmetic derivative.

Table of values

n a(n)
1 0
2 1
3 2
4 2
5 6
6 1
7 30
8 3
9 4
10 1
11 210
12 4
13 2310
14 1
15 4
16 4
17 30030
18 1
19 510510
20 4
21 8
22 1
23 9699690
24 1
25 12
26 1
27 6
28 4
29 223092870
30 1
31 6469693230
32 5
33 4
34 1
35 12
36 6
37 200560490130
38 1
39 4
40 9
41 7420738134810
42 1
43 304250263527210
44 4
45 2
46 1
47 13082761331670030
48 2
49 60
50 1
51 4
52 4
53 614889782588491410
54 1
55 36
56 3
57 16
58 1
59 32589158477190044730
60 2

List of values

[0, 1, 2, 2, 6, 1, 30, 3, 4, 1, 210, 4, 2310, 1, 4, 4, 30030, 1, 510510, 4, 8, 1, 9699690, 1, 12, 1, 6, 4, 223092870, 1, 6469693230, 5, 4, 1, 12, 6, 200560490130, 1, 4, 9, 7420738134810, 1, 304250263527210, 4, 2, 1, 13082761331670030, 2, 60, 1, 4, 4, 614889782588491410, 1, 36, 3, 16, 1, 32589158477190044730, 2]