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.

A281210 Number of 6 X n 0..1 arrays with no element equal to more than one of its horizontal and antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.

Table of values

n a(n)
1 0
2 420
3 1120
4 1588
5 2602
6 4248
7 6838
8 11010
9 17840
10 29120
11 47838
12 78978
13 130842
14 217250
15 361188
16 600860
17 999718
18 1663078
19 2765630
20 4596962
21 7636856
22 12679768
23 21040526
24 34894090
25 57836514
26 95810754
27 158634028
28 262516660
29 434214550

List of values

[0, 420, 1120, 1588, 2602, 4248, 6838, 11010, 17840, 29120, 47838, 78978, 130842, 217250, 361188, 600860, 999718, 1663078, 2765630, 4596962, 7636856, 12679768, 21040526, 34894090, 57836514, 95810754, 158634028, 262516660, 434214550]