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.

A268205 Number of 1Xn 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 2
2 9
3 60
4 570
5 6960
6 104006
7 1837752
8 37478718
9 866361210
10 22384298772
11 639235846656
12 19993319047663
13 679693673292816
14 24954856965472485
15 984056034148827632
16 41479800266522142954
17 1861205533117885580022

List of values

[2, 9, 60, 570, 6960, 104006, 1837752, 37478718, 866361210, 22384298772, 639235846656, 19993319047663, 679693673292816, 24954856965472485, 984056034148827632, 41479800266522142954, 1861205533117885580022]

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

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