cp's OEIS Frontend

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.

A064857 Numerators of partial sums of reciprocals of lcm(1..n) = A003418(n).

Table of values

n a(n)
1 1
2 3
3 5
4 7
5 53
6 107
7 25
8 1501
9 563
10 901
11 12389
12 16519
13 322121
14 644243
15 53687
16 1288489
17 3650719
18 4380863
19 18917363
20 3557111
21 104045497
22 416181989
23 2393046437
24 455818369
25 23930464373
26 47860928747
27 10255913303
28 11044829711

List of values

[1, 3, 5, 7, 53, 107, 25, 1501, 563, 901, 12389, 16519, 322121, 644243, 53687, 1288489, 3650719, 4380863, 18917363, 3557111, 104045497, 416181989, 2393046437, 455818369, 23930464373, 47860928747, 10255913303, 11044829711]

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

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