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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.

A280745 Primes p such that A280864(k)=p for some k and A280864(k-1)=m*p for some m>1.

Table of values

n a(n)
1 13
2 139
3 379
4 397
5 647
6 661
7 967
8 983
9 997
10 1021
11 1063
12 1109
13 1129
14 1187
15 1201
16 1223
17 1231
18 1249
19 1289
20 1297
21 1307
22 1453
23 1481
24 1487
25 1499
26 1543
27 1553
28 1597
29 1607
30 1613
31 1621
32 1637
33 1667
34 1697
35 1723
36 1759
37 1789
38 1831
39 1867
40 1873
41 1879
42 1907
43 1933
44 2011
45 2029
46 2069
47 2083
48 2089
49 2141
50 2309

List of values

[13, 139, 379, 397, 647, 661, 967, 983, 997, 1021, 1063, 1109, 1129, 1187, 1201, 1223, 1231, 1249, 1289, 1297, 1307, 1453, 1481, 1487, 1499, 1543, 1553, 1597, 1607, 1613, 1621, 1637, 1667, 1697, 1723, 1759, 1789, 1831, 1867, 1873, 1879, 1907, 1933, 2011, 2029, 2069, 2083, 2089, 2141, 2309]