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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.

A336520 Primes in Pi: a(n) is the smallest prime factor of A090897(n) that does not appear in earlier terms of A090897, or 1, if no such factor exists.

Table of values

n a(n)
1 3
2 2
3 53
4 379
5 58979
6 161923
7 2643383
8 1746893
9 6971
10 5
11 17
12 1499
13 11
14 1555077581737
15 297707
16 4733
17 37
18 126541
19 2130276389911155737
20 1429
21 71971
22 383
23 61
24 1559
25 29
26 193
27 12073
28 698543
29 157
30 20289606809
31 23687
32 1249
33 59
34 2393
35 251
36 101
37 15827173
38 82351
39 661

List of values

[3, 2, 53, 379, 58979, 161923, 2643383, 1746893, 6971, 5, 17, 1499, 11, 1555077581737, 297707, 4733, 37, 126541, 2130276389911155737, 1429, 71971, 383, 61, 1559, 29, 193, 12073, 698543, 157, 20289606809, 23687, 1249, 59, 2393, 251, 101, 15827173, 82351, 661]

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

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