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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.

A115646 Semiprimes (A001358) that are sums of distinct factorials.

Table of values

n a(n)
1 6
2 9
3 25
4 26
5 33
6 121
7 122
8 123
9 129
10 145
11 146
12 721
13 723
14 745
15 746
16 753
17 841
18 842
19 843
20 849
21 865
22 866
23 871
24 5041
25 5042
26 5065
27 5071
28 5161
29 5163
30 5169
31 5186
32 5191
33 5761
34 5767
35 5793
36 5905
37 5906
38 5911
39 40321
40 40322
41 40323
42 40345
43 40346
44 40353
45 40441

List of values

[6, 9, 25, 26, 33, 121, 122, 123, 129, 145, 146, 721, 723, 745, 746, 753, 841, 842, 843, 849, 865, 866, 871, 5041, 5042, 5065, 5071, 5161, 5163, 5169, 5186, 5191, 5761, 5767, 5793, 5905, 5906, 5911, 40321, 40322, 40323, 40345, 40346, 40353, 40441]

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

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