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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.

A071680 Primes that are the arithmetic mean of their prime predecessor and another prime.

Table of values

n a(n)
1 5
2 37
3 53
4 67
5 157
6 173
7 211
8 257
9 263
10 277
11 373
12 479
13 563
14 593
15 607
16 613
17 631
18 653
19 733
20 809
21 947
22 977
23 1009
24 1103
25 1123
26 1187
27 1223
28 1297
29 1367
30 1471
31 1511
32 1607
33 1663
34 1721
35 1747
36 1753
37 1783
38 1867
39 1901
40 1907
41 1931
42 1993
43 2137
44 2287
45 2377
46 2411
47 2417

List of values

[5, 37, 53, 67, 157, 173, 211, 257, 263, 277, 373, 479, 563, 593, 607, 613, 631, 653, 733, 809, 947, 977, 1009, 1103, 1123, 1187, 1223, 1297, 1367, 1471, 1511, 1607, 1663, 1721, 1747, 1753, 1783, 1867, 1901, 1907, 1931, 1993, 2137, 2287, 2377, 2411, 2417]

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

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