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.

A317394 Positive integers that have exactly four representations of the form 1 + p1 * (1 + p2* ... * (1 + p_j)...), where [p1, ..., p_j] is a (possibly empty) list of distinct primes.

Table of values

n a(n)
1 211
2 261
3 421
4 426
5 441
6 484
7 535
8 540
9 591
10 621
11 634
12 667
13 683
14 691
15 715
16 726
17 732
18 761
19 771
20 776
21 778
22 794
23 818
24 853
25 862
26 871
27 925
28 970
29 979
30 987
31 989
32 1011
33 1021
34 1023
35 1038
36 1074
37 1086
38 1105
39 1114
40 1141
41 1171
42 1176
43 1184
44 1190
45 1197
46 1222
47 1261
48 1266

List of values

[211, 261, 421, 426, 441, 484, 535, 540, 591, 621, 634, 667, 683, 691, 715, 726, 732, 761, 771, 776, 778, 794, 818, 853, 862, 871, 925, 970, 979, 987, 989, 1011, 1021, 1023, 1038, 1074, 1086, 1105, 1114, 1141, 1171, 1176, 1184, 1190, 1197, 1222, 1261, 1266]