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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.

A262009 Sum_{d|n} 2^(d^2) * n^2/d^2.

Table of values

n a(n)
1 2
2 24
3 530
4 65632
5 33554482
6 68719479000
7 562949953421410
8 18446744073709814144
9 2417851639229258349417122
10 1267650600228229401496837423704
11 2658455991569831745807614120560689394
12 22300745198530623141535718272648636384486240
13 748288838313422294120286634350736906063837462004050

List of values

[2, 24, 530, 65632, 33554482, 68719479000, 562949953421410, 18446744073709814144, 2417851639229258349417122, 1267650600228229401496837423704, 2658455991569831745807614120560689394, 22300745198530623141535718272648636384486240, 748288838313422294120286634350736906063837462004050]

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

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