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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.

A375521 a(n) is the numerator of Sum_{k = 1..n} 1 / (k*A375781(k)).

Table of values

n a(n)
0 0
1 1
2 5
3 14
4 103
5 1154
6 1336333
7 892896284279
8 398631887241408183843479
9 19863422690705846097977473796903171171326157279
10 14091270035344566960604487534521565339065390839583445590118556137472614250693240040301050079

List of values

[0, 1, 5, 14, 103, 1154, 1336333, 892896284279, 398631887241408183843479, 19863422690705846097977473796903171171326157279, 14091270035344566960604487534521565339065390839583445590118556137472614250693240040301050079]

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

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