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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.

A061560 Lengths of Farey-series (A005728) which are not primes.

Table of values

n a(n)
1 1
2 33
3 65
4 81
5 121
6 129
7 141
8 201
9 213
10 231
11 243
12 279
13 309
14 325
15 345
16 361
17 385
18 451
19 475
20 531
21 543
22 585
23 605
24 629
25 651
26 697
27 713
28 755
29 775
30 807
31 831
32 901
33 965
34 1001
35 1029
36 1261
37 1309
38 1329
39 1395
40 1495
41 1565
42 1589
43 1661
44 1737
45 1773
46 1833
47 1857
48 1935
49 1967

List of values

[1, 33, 65, 81, 121, 129, 141, 201, 213, 231, 243, 279, 309, 325, 345, 361, 385, 451, 475, 531, 543, 585, 605, 629, 651, 697, 713, 755, 775, 807, 831, 901, 965, 1001, 1029, 1261, 1309, 1329, 1395, 1495, 1565, 1589, 1661, 1737, 1773, 1833, 1857, 1935, 1967]

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

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