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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.

A219474 Number of 4Xn arrays of the minimum value of corresponding elements and their horizontal or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and columns, 0..3 4Xn array.

Table of values

n a(n)
1 35
2 239
3 5040
4 87083
5 1227441
6 14696377
7 157191488
8 1532762665
9 13807624794
10 116296337706
11 924459750842
12 6973773054426
13 50113925911679
14 344224992704591
15 2267656840216326
16 14372813464098494
17 87897599949502791
18 519959958984757538

List of values

[35, 239, 5040, 87083, 1227441, 14696377, 157191488, 1532762665, 13807624794, 116296337706, 924459750842, 6973773054426, 50113925911679, 344224992704591, 2267656840216326, 14372813464098494, 87897599949502791, 519959958984757538]

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

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