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.

A133413 Half the number of ways of placing up to n^2 pawns on an n x n chessboard so that it balances at its midpoint.

Table of values

n a(n)
1 1
2 2
3 24
4 492
5 202064
6 100202536
7 888531141152
8 8548846756027594
9 1400822035743239844640
10 241149984205773848119833656
11 691305758149247080625180837349904
12 2048332087899166877612856148780183708362
13 99840603982108483679316058344233421388081447648

List of values

[1, 2, 24, 492, 202064, 100202536, 888531141152, 8548846756027594, 1400822035743239844640, 241149984205773848119833656, 691305758149247080625180837349904, 2048332087899166877612856148780183708362, 99840603982108483679316058344233421388081447648]

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

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