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.

A064167 Product of numerator and denominator of the n-th harmonic number, 1 + 1/2 + 1/3 +...+ 1/n.

Table of values

n a(n)
1 1
2 6
3 66
4 300
5 8220
6 980
7 50820
8 213080
9 17965080
10 18600120
11 2320468920
12 2384502120
13 412970037480
14 422245703880
15 430902992520
16 1756076802480
17 516336630329520
18 58297387228080
19 21362271268818480
20 866533600973040
21 97555876321904
22 98772315738096
23 52866073370045936
24 481103506052529360

List of values

[1, 6, 66, 300, 8220, 980, 50820, 213080, 17965080, 18600120, 2320468920, 2384502120, 412970037480, 422245703880, 430902992520, 1756076802480, 516336630329520, 58297387228080, 21362271268818480, 866533600973040, 97555876321904, 98772315738096, 52866073370045936, 481103506052529360]

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

Content is available under The OEIS End-User License Agreement.