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.

A217640 Number of nX3 arrays of the minimum value of corresponding elements and their horizontal, vertical or antidiagonal neighbors in a random 0..2 nX3 array.

Table of values

n a(n)
1 9
2 27
3 163
4 877
5 5119
6 29101
7 166193
8 949883
9 5424617
10 30992313
11 177045523
12 1011403721
13 5777856321
14 33007064639
15 188559321601
16 1077181452713
17 6153607089559
18 35153670287907
19 200822133317793
20 1147235248764407

List of values

[9, 27, 163, 877, 5119, 29101, 166193, 949883, 5424617, 30992313, 177045523, 1011403721, 5777856321, 33007064639, 188559321601, 1077181452713, 6153607089559, 35153670287907, 200822133317793, 1147235248764407]

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

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