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.

A209677 Number of n X n 0..n arrays with every element equal to a diagonal or antidiagonal reflection, and new values 0 upwards introduced in row major order.

Table of values

n a(n)
1 1
2 14
3 1243
4 6716352
5 268997909000
6 1568091719977974635
7 70570762532647014868797563
8 841333288100321854075145135825724005
9 79538689762318826508394939059605661254128283987

List of values

[1, 14, 1243, 6716352, 268997909000, 1568091719977974635, 70570762532647014868797563, 841333288100321854075145135825724005, 79538689762318826508394939059605661254128283987]

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

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