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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.

A237628 a(n) is the smallest product of prime numbers such that all numbers from 6 and 2n can be written as the sum of two prime factors (duplication allowed) of a(n).

Table of values

n a(n)
3 3
4 15
5 15
6 105
7 105
8 1155
9 1155
10 1365
11 15015
12 15015
13 15015
14 255255
15 255255
16 596505
17 4849845
18 4849845
19 4849845
20 10140585
21 10140585
22 179444265
23 229474245
24 229474245
25 242777535
26 640049865
27 5898837945
28 7357214865
29 7357214865
30 7357214865
31 13350001665
32 196656364905

List of values

[3, 15, 15, 105, 105, 1155, 1155, 1365, 15015, 15015, 15015, 255255, 255255, 596505, 4849845, 4849845, 4849845, 10140585, 10140585, 179444265, 229474245, 229474245, 242777535, 640049865, 5898837945, 7357214865, 7357214865, 7357214865, 13350001665, 196656364905]

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

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