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.

A380328 2-dense squarefree numbers: Squarefree numbers whose divisors increase by factors of at most 2.

Table of values

n a(n)
1 1
2 2
3 6
4 30
5 42
6 66
7 210
8 330
9 390
10 462
11 510
12 546
13 570
14 690
15 714
16 798
17 858
18 870
19 930
20 966
21 1110
22 1122
23 1218
24 1230
25 1254
26 1290
27 1302
28 1410
29 1518
30 1554
31 1590
32 1722
33 1770
34 1806
35 1914
36 1974
37 2046
38 2226
39 2310
40 2442
41 2478
42 2562
43 2706
44 2730
45 2814
46 2838
47 2982
48 3066
49 3102
50 3318
51 3486
52 3498

List of values

[1, 2, 6, 30, 42, 66, 210, 330, 390, 462, 510, 546, 570, 690, 714, 798, 858, 870, 930, 966, 1110, 1122, 1218, 1230, 1254, 1290, 1302, 1410, 1518, 1554, 1590, 1722, 1770, 1806, 1914, 1974, 2046, 2226, 2310, 2442, 2478, 2562, 2706, 2730, 2814, 2838, 2982, 3066, 3102, 3318, 3486, 3498]