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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.

A370495 Oblong numbers of the form (k-1)*k where k is the product of an even number of distinct primes.

Table of values

n a(n)
1 0
2 30
3 90
4 182
5 210
6 420
7 462
8 650
9 1056
10 1122
11 1190
12 1406
13 1482
14 2070
15 2550
16 2970
17 3192
18 3306
19 3782
20 4160
21 4692
22 5402
23 5852
24 6642
25 7140
26 7310
27 7482
28 8190
29 8556
30 8742
31 8930
32 11130
33 12210
34 13110
35 13806
36 14042
37 14762
38 15006
39 16512
40 17556
41 17822
42 19740
43 20022
44 20306

List of values

[0, 30, 90, 182, 210, 420, 462, 650, 1056, 1122, 1190, 1406, 1482, 2070, 2550, 2970, 3192, 3306, 3782, 4160, 4692, 5402, 5852, 6642, 7140, 7310, 7482, 8190, 8556, 8742, 8930, 11130, 12210, 13110, 13806, 14042, 14762, 15006, 16512, 17556, 17822, 19740, 20022, 20306]

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

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