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.

A208087 Number of 6 X (n+1) 0..1 arrays with every 2 X 2 subblock having the same number of equal edges as its horizontal neighbors and a different number from its vertical neighbors, and new values 0..1 introduced in row major order.

Table of values

n a(n)
1 72
2 168
3 402
4 1032
5 2664
6 6954
7 18168
8 47544
9 124434
10 325752
11 852792
12 2232618
13 5845032
14 15302472
15 40062354
16 104884584
17 274591368
18 718889514
19 1882077144
20 4927341912
21 12899948562
22 33772503768
23 88417562712
24 231480184362

List of values

[72, 168, 402, 1032, 2664, 6954, 18168, 47544, 124434, 325752, 852792, 2232618, 5845032, 15302472, 40062354, 104884584, 274591368, 718889514, 1882077144, 4927341912, 12899948562, 33772503768, 88417562712, 231480184362]