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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.

A262826 a(n) = Sum_{d|n} -(-1)^d * 2^(n^2/d) * d.

Table of values

n a(n)
1 2
2 8
3 536
4 64960
5 33554592
6 68718964352
7 562949953422208
8 18446744065119352832
9 2417851639229258752070144
10 1267650600228227149696894752768
11 2658455991569831745807614120560711680
12 22300745198530623141526273540526772167065600
13 748288838313422294120286634350736906063837462110208
14 100433627766186892221372630770688837357523572410678079422464

List of values

[2, 8, 536, 64960, 33554592, 68718964352, 562949953422208, 18446744065119352832, 2417851639229258752070144, 1267650600228227149696894752768, 2658455991569831745807614120560711680, 22300745198530623141526273540526772167065600, 748288838313422294120286634350736906063837462110208, 100433627766186892221372630770688837357523572410678079422464]

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

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