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.

A209678 Number of n X n 0..3 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
3 608
4 246038
5 166075313
6 1008907523438
7 10215188674804688
8 930859067991577148438
9 141374220951220779418945313
10 193240888262699902868270874023438

List of values

[1, 14, 608, 246038, 166075313, 1008907523438, 10215188674804688, 930859067991577148438, 141374220951220779418945313, 193240888262699902868270874023438]

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

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