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.

A024915 Number of positions in which 2n semi-queens may be placed on an 2n X 2n toroidal board, with only one semi-queen attacking another semi-queen; also, number of interval method wirings for a cryptographic rotor of size 2n.

Table of values

n a(n)
1 2
2 16
3 144
4 2048
5 46400
6 1262592
7 44493568
8 2000420864
9 110023308288

List of values

[2, 16, 144, 2048, 46400, 1262592, 44493568, 2000420864, 110023308288]

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

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