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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.

A135170 Primes equal to a sum c1+c2 of two consecutive composite numbers such that lpf(c1)-spf(c1)+lpf(c2)-spf(c2) from their largest and smallest prime factors is prime.

Table of values

n a(n)
1 19
2 29
3 31
4 41
5 43
6 53
7 67
8 71
9 79
10 89
11 101
12 109
13 131
14 149
15 151
16 173
17 197
18 199
19 233
20 239
21 241
22 251
23 269
24 271
25 283
26 307
27 311
28 317
29 331
30 337
31 349
32 367
33 401
34 419
35 439
36 449
37 461
38 487
39 491
40 499
41 509
42 521
43 593
44 599
45 617
46 641
47 647
48 683
49 691
50 727
51 739
52 751
53 769
54 809

List of values

[19, 29, 31, 41, 43, 53, 67, 71, 79, 89, 101, 109, 131, 149, 151, 173, 197, 199, 233, 239, 241, 251, 269, 271, 283, 307, 311, 317, 331, 337, 349, 367, 401, 419, 439, 449, 461, 487, 491, 499, 509, 521, 593, 599, 617, 641, 647, 683, 691, 727, 739, 751, 769, 809]

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

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