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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.

A175455 a(n) = H(n) * (lcm(1,2,...,n))^2, where H(n) = harmonic numbers (1/1 + 1/2 + ... + 1/n).

Table of values

n a(n)
1 1
2 6
3 66
4 300
5 8220
6 8820
7 457380
8 1917720
9 17965080
10 18600120
11 2320468920
12 2384502120
13 412970037480
14 422245703880
15 430902992520
16 1756076802480
17 516336630329520
18 524676485052720
19 192260441419366320
20 194970060218934000
21 197550649551855600
22 200013939369644400

List of values

[1, 6, 66, 300, 8220, 8820, 457380, 1917720, 17965080, 18600120, 2320468920, 2384502120, 412970037480, 422245703880, 430902992520, 1756076802480, 516336630329520, 524676485052720, 192260441419366320, 194970060218934000, 197550649551855600, 200013939369644400]

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

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