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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.

A195506 Denominator of Sum_{k=1..n} H(k)/k^2, where H(k) is the k-th harmonic number.

Table of values

n a(n)
1 1
2 8
3 216
4 1728
5 216000
6 216000
7 74088000
8 592704000
9 16003008000
10 16003008000
11 21300003648000
12 21300003648000
13 46796108014656000
14 46796108014656000
15 46796108014656000
16 374368864117248000
17 1839274229408039424000
18 1839274229408039424000

List of values

[1, 8, 216, 1728, 216000, 216000, 74088000, 592704000, 16003008000, 16003008000, 21300003648000, 21300003648000, 46796108014656000, 46796108014656000, 46796108014656000, 374368864117248000, 1839274229408039424000, 1839274229408039424000]

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

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