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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.

A090947 Largest prime factor of numerator of Bernoulli(2n) (or 1 if the numerator is 1).

Table of values

n a(n)
0 1
1 1
2 1
3 1
4 1
5 5
6 691
7 7
8 3617
9 43867
10 617
11 593
12 2294797
13 657931
14 362903
15 1001259881
16 305065927
17 151628697551
18 26315271553053477373
19 154210205991661
20 1897170067619
21 1520097643918070802691
22 1798482437
23 67568238839737
24 153289748932447906241
25 47464429777438199
26 4534045619429
27 1120412849144121779
28 19088082706840550550313
29 37349583369104129
30 109317926249509865753025015237911
31 28765594733083851481
32 87057315354522179184989699791727
33 159562251828620181390358590156239282938769
34 5525473366510930028227481

List of values

[1, 1, 1, 1, 1, 5, 691, 7, 3617, 43867, 617, 593, 2294797, 657931, 362903, 1001259881, 305065927, 151628697551, 26315271553053477373, 154210205991661, 1897170067619, 1520097643918070802691, 1798482437, 67568238839737, 153289748932447906241, 47464429777438199, 4534045619429, 1120412849144121779, 19088082706840550550313, 37349583369104129, 109317926249509865753025015237911, 28765594733083851481, 87057315354522179184989699791727, 159562251828620181390358590156239282938769, 5525473366510930028227481]

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

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