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.

A207765 Number of 5Xn 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 1 1 and 1 0 1 vertically.

Table of values

n a(n)
1 14
2 196
3 488
4 2245
5 6552
6 16920
7 59252
8 188350
9 538950
10 1709438
11 5427808
12 16323968
13 50456976
14 158170514
15 485197851
16 1494251065
17 4644507594
18 14337420385
19 44204714925
20 136866164125
21 423105979612
22 1306174738721
23 4038464232068

List of values

[14, 196, 488, 2245, 6552, 16920, 59252, 188350, 538950, 1709438, 5427808, 16323968, 50456976, 158170514, 485197851, 1494251065, 4644507594, 14337420385, 44204714925, 136866164125, 423105979612, 1306174738721, 4038464232068]