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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.

A308971 Largest prime factor of A001008(n), numerator of n-th harmonic number; a(1) = 1.

Table of values

n a(n)
1 1
2 3
3 11
4 5
5 137
6 7
7 11
8 761
9 7129
10 61
11 863
12 509
13 919
14 1117
15 41233
16 8431
17 1138979
18 39541
19 7440427
20 11167027
21 18858053
22 227
23 583859
24 467183
25 312408463
26 34395742267
27 215087
28 375035183
29 4990290163
30 17783
31 2667653736673
32 535919
33 199539368321
34 15088528003
35 137121586897

List of values

[1, 3, 11, 5, 137, 7, 11, 761, 7129, 61, 863, 509, 919, 1117, 41233, 8431, 1138979, 39541, 7440427, 11167027, 18858053, 227, 583859, 467183, 312408463, 34395742267, 215087, 375035183, 4990290163, 17783, 2667653736673, 535919, 199539368321, 15088528003, 137121586897]

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

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