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.

A303555 Triangle read by rows: T(n,k) = 2^(n-k)*prime(k)#, 1 <= k <= n, where prime(k)# is the product of first k primes.

Table of values

n a(n)
1 2
2 4
3 6
4 8
5 12
6 30
7 16
8 24
9 60
10 210
11 32
12 48
13 120
14 420
15 2310
16 64
17 96
18 240
19 840
20 4620
21 30030
22 128
23 192
24 480
25 1680
26 9240
27 60060
28 510510
29 256
30 384
31 960
32 3360
33 18480
34 120120
35 1021020
36 9699690
37 512
38 768
39 1920
40 6720
41 36960
42 240240
43 2042040
44 19399380
45 223092870
46 1024
47 1536
48 3840
49 13440
50 73920
51 480480
52 4084080
53 38798760
54 446185740
55 6469693230

List of values

[2, 4, 6, 8, 12, 30, 16, 24, 60, 210, 32, 48, 120, 420, 2310, 64, 96, 240, 840, 4620, 30030, 128, 192, 480, 1680, 9240, 60060, 510510, 256, 384, 960, 3360, 18480, 120120, 1021020, 9699690, 512, 768, 1920, 6720, 36960, 240240, 2042040, 19399380, 223092870, 1024, 1536, 3840, 13440, 73920, 480480, 4084080, 38798760, 446185740, 6469693230]