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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.

A382813 Denominator of the n-th partial sum of the squares of the harmonic numbers.

Table of values

n a(n)
1 1
2 4
3 18
4 144
5 200
6 400
7 4900
8 78400
9 635040
10 6350400
11 64033200
12 768398400
13 9275666400
14 8657288640
15 16232416200
16 519437318400
17 2779951574400
18 16679709446400
19 60213751101504
20 3823095308032
21 1216439416192
22 26761667156224
23 1769615240705312
24 127412297330782464
25 3062795608913040000

List of values

[1, 4, 18, 144, 200, 400, 4900, 78400, 635040, 6350400, 64033200, 768398400, 9275666400, 8657288640, 16232416200, 519437318400, 2779951574400, 16679709446400, 60213751101504, 3823095308032, 1216439416192, 26761667156224, 1769615240705312, 127412297330782464, 3062795608913040000]

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

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