cp's OEIS Frontend

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.

A322639 Number of solutions to |dft(a)^2 + dft(b)^2 + dft(c)^2 + dft(d)^2| = 4n, where a,b,c,d are +1,-1 sequences of length n and dft(x) denotes the discrete Fourier transform of x.

Table of values

n a(n)
1 16
2 96
3 192
4 896
5 960
6 4608
7 6720

List of values

[16, 96, 192, 896, 960, 4608, 6720]

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

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