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.

A187880 Number of n X n matrices over GF(2) that can be used as a kernel to construct a polar code. That is, the number of matrices for which channel polarization occurs.

Table of values

n a(n)
1 0
2 2
3 120
4 18624
5 9876480
6 20135116800
7 163839423283200
8 5348052945894113280
9 699612285096273924587520
10 366440137172271078986848665600
11 768105432116827516249785005978419200
12 6441762292785726797799215491828242028953600

List of values

[0, 2, 120, 18624, 9876480, 20135116800, 163839423283200, 5348052945894113280, 699612285096273924587520, 366440137172271078986848665600, 768105432116827516249785005978419200, 6441762292785726797799215491828242028953600]

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

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