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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.

A240779 Number of nX4 0..1 arrays with no element equal to fewer vertical neighbors than horizontal neighbors, with new values 0..1 introduced in row major order.

Table of values

n a(n)
1 1
2 6
3 46
4 305
5 2167
6 15332
7 108509
8 767834
9 5434887
10 38467875
11 272273018
12 1927138748
13 13640213436
14 96544878838
15 683340799760
16 4836658942731
17 34233678967243
18 242304613789940
19 1715022389014131
20 12138860042126682

List of values

[1, 6, 46, 305, 2167, 15332, 108509, 767834, 5434887, 38467875, 272273018, 1927138748, 13640213436, 96544878838, 683340799760, 4836658942731, 34233678967243, 242304613789940, 1715022389014131, 12138860042126682]

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

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