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.

A246947 a(1)=30; for n > 1, a(n) is the least integer not occurring earlier such that a(n) shares exactly three distinct prime divisors with a(n-1).

Table of values

n a(n)
1 30
2 60
3 90
4 120
5 150
6 180
7 210
8 42
9 84
10 126
11 168
12 252
13 294
14 336
15 378
16 420
17 70
18 140
19 280
20 350
21 490
22 560
23 630
24 105
25 315
26 525
27 735
28 840
29 240
30 270
31 300
32 330
33 66
34 132
35 198
36 264
37 396
38 462
39 154
40 308
41 616
42 770
43 110
44 220
45 440
46 550
47 660
48 165
49 495
50 825
51 990
52 360
53 390
54 78

List of values

[30, 60, 90, 120, 150, 180, 210, 42, 84, 126, 168, 252, 294, 336, 378, 420, 70, 140, 280, 350, 490, 560, 630, 105, 315, 525, 735, 840, 240, 270, 300, 330, 66, 132, 198, 264, 396, 462, 154, 308, 616, 770, 110, 220, 440, 550, 660, 165, 495, 825, 990, 360, 390, 78]

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

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