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.

A268206 Number of 2Xn 0..n arrays with every repeated value in every row and column greater than the previous repeated value.

Table of values

n a(n)
1 4
2 81
3 3600
4 324900
5 48441600
6 10817248036
7 3377332413504
8 1404654302923524
9 750581746192664100
10 501056831514160707984
11 408622467650013146382336
12 399732806541644129265761569
13 461983489514281294192077209856

List of values

[4, 81, 3600, 324900, 48441600, 10817248036, 3377332413504, 1404654302923524, 750581746192664100, 501056831514160707984, 408622467650013146382336, 399732806541644129265761569, 461983489514281294192077209856]

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

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