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.

A217543 Number of n X 4 arrays of the minimum value of corresponding elements and their horizontal, vertical, diagonal or antidiagonal neighbors in a random 0..2 n X 4 array.

Table of values

n a(n)
1 17
2 17
3 289
4 1401
5 10213
6 64473
7 431241
8 2824177
9 18626981
10 122511585
11 806649933
12 5309370017
13 34951088945
14 230067107597
15 1514453687653
16 9969070507989
17 65622772473105
18 431970507432905
19 2843503407066145
20 18717737327894065

List of values

[17, 17, 289, 1401, 10213, 64473, 431241, 2824177, 18626981, 122511585, 806649933, 5309370017, 34951088945, 230067107597, 1514453687653, 9969070507989, 65622772473105, 431970507432905, 2843503407066145, 18717737327894065]

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

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