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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.

A265378 Numbers n such that n!3 + 3^9 is prime, where n!3 = n!!! is a triple factorial number (A007661).

Table of values

n a(n)
1 4
2 8
3 10
4 11
5 14
6 17
7 20
8 22
9 29
10 32
11 44
12 56
13 61
14 173
15 202
16 211
17 215
18 241
19 388
20 410
21 416
22 569
23 583
24 680
25 823
26 964
27 1271
28 1732
29 2309
30 2335
31 2404
32 2765
33 3019
34 3047
35 4670
36 5209
37 6320
38 6817
39 7531
40 9923
41 11243
42 14912
43 17969
44 21193
45 28940

List of values

[4, 8, 10, 11, 14, 17, 20, 22, 29, 32, 44, 56, 61, 173, 202, 211, 215, 241, 388, 410, 416, 569, 583, 680, 823, 964, 1271, 1732, 2309, 2335, 2404, 2765, 3019, 3047, 4670, 5209, 6320, 6817, 7531, 9923, 11243, 14912, 17969, 21193, 28940]

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

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