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.

A218892 Number of n X 3 arrays of the minimum value of corresponding elements and their horizontal, diagonal or antidiagonal neighbors in a random 0..1 n X 3 array.

Table of values

n a(n)
1 4
2 18
3 72
4 286
5 1162
6 4700
7 19046
8 77198
9 312944
10 1268694
11 5143506
12 20852924
13 84542894
14 342758566
15 1389632608
16 5633935678
17 22841460250
18 92605309212
19 375446383830
20 1522158836638
21 6171234143440
22 25019814013190
23 101436937848962

List of values

[4, 18, 72, 286, 1162, 4700, 19046, 77198, 312944, 1268694, 5143506, 20852924, 84542894, 342758566, 1389632608, 5633935678, 22841460250, 92605309212, 375446383830, 1522158836638, 6171234143440, 25019814013190, 101436937848962]

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

Content is available under The OEIS End-User License Agreement.