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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.

A217633 Number of n X 4 arrays of the minimum value of corresponding elements and their horizontal and vertical neighbors in a random 0..1 n X 4 array.

Table of values

n a(n)
1 6
2 38
3 244
4 1418
5 8706
6 52120
7 315378
8 1900838
9 11472148
10 69210290
11 417586442
12 2519466108
13 15201104542
14 91714930026
15 553357475040
16 3338651662490
17 20143579337906
18 121535200857060
19 733276159043790
20 4424182455856594
21 26693068489330768
22 161051201588069830
23 971693816818476190

List of values

[6, 38, 244, 1418, 8706, 52120, 315378, 1900838, 11472148, 69210290, 417586442, 2519466108, 15201104542, 91714930026, 553357475040, 3338651662490, 20143579337906, 121535200857060, 733276159043790, 4424182455856594, 26693068489330768, 161051201588069830, 971693816818476190]

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

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