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.

A371799 Rectangular array, read by downward antidiagonals: row n shows the numbers m>1 in whose prime factorization p(1)^e(1)*p(2)^e(2)* ...*p(k)^e(k), all e(i) are <= 1 and the number of 0' s in {e(i)} is n-1.

Table of values

n a(n)
1 2
2 6
3 3
4 30
5 10
6 5
7 210
8 15
9 14
10 7
11 2310
12 42
13 21
14 22
15 11
16 30030
17 70
18 35
19 33
20 26
21 13
22 510510
23 105
24 66
25 55
26 39
27 34
28 17
29 9699690
30 330
31 110
32 77
33 65
34 51
35 38
36 19
37 223092870
38 462
39 154
40 78
41 91
42 85
43 57
44 46
45 23
46 6469693230
47 770
48 165
49 130
50 102
51 114
52 95
53 69
54 58
55 29

List of values

[2, 6, 3, 30, 10, 5, 210, 15, 14, 7, 2310, 42, 21, 22, 11, 30030, 70, 35, 33, 26, 13, 510510, 105, 66, 55, 39, 34, 17, 9699690, 330, 110, 77, 65, 51, 38, 19, 223092870, 462, 154, 78, 91, 85, 57, 46, 23, 6469693230, 770, 165, 130, 102, 114, 95, 69, 58, 29]