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.

A266021 Number of nX4 integer arrays with each element equal to the number of horizontal, vertical and antidiagonal neighbors exactly one smaller than itself.

Table of values

n a(n)
1 5
2 42
3 91
4 577
5 3796
6 19688
7 110924
8 656555
9 3732300
10 21344656
11 123330565
12 708246405
13 4066193034
14 23408646708
15 134627655119
16 773992993358
17 4452175085918
18 25607065587568
19 147270467464058
20 847048745101385

List of values

[5, 42, 91, 577, 3796, 19688, 110924, 656555, 3732300, 21344656, 123330565, 708246405, 4066193034, 23408646708, 134627655119, 773992993358, 4452175085918, 25607065587568, 147270467464058, 847048745101385]

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

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