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.

A280878 Occurrences of decrease of the probability density P(n) of coprime numbers k,m, satisfying 1 <= k <= a(n) and 1 <= m <= a(n), and a(n) congruent to 1(mod 2) and a(n) congruent to {3,9,21,27}(mod 30).

Table of values

n a(n)
1 21
2 33
3 63
4 99
5 147
6 189
7 231
8 273
9 297
10 357
11 363
12 399
13 429
14 441
15 483
16 561
17 567
18 609
19 627
20 651
21 663
22 693
23 741
24 759
25 777
26 819
27 861
28 891
29 897
30 903
31 957
32 969
33 987
34 1023
35 1029
36 1071
37 1089
38 1113
39 1131
40 1173
41 1197
42 1209
43 1221
44 1239
45 1281
46 1287
47 1311
48 1323
49 1353
50 1407
51 1419
52 1443
53 1449

List of values

[21, 33, 63, 99, 147, 189, 231, 273, 297, 357, 363, 399, 429, 441, 483, 561, 567, 609, 627, 651, 663, 693, 741, 759, 777, 819, 861, 891, 897, 903, 957, 969, 987, 1023, 1029, 1071, 1089, 1113, 1131, 1173, 1197, 1209, 1221, 1239, 1281, 1287, 1311, 1323, 1353, 1407, 1419, 1443, 1449]