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.

A261374 Number of (n+2) X (2+2) 0..1 arrays with each 3 X 3 subblock having clockwise perimeter pattern 00001011 00010101 or 01010101.

Table of values

n a(n)
1 39
2 41
3 82
4 157
5 266
6 470
7 864
8 1553
9 2758
10 4960
11 8924
12 16001
13 28662
14 51503
15 92374
16 165796
17 297284
18 533858
19 957252
20 1718645
21 3081790
22 5533474
23 9922064
24 17814980
25 31944528
26 57356546
27 102846820
28 184661677
29 331120454
30 594527399
31 1066057422

List of values

[39, 41, 82, 157, 266, 470, 864, 1553, 2758, 4960, 8924, 16001, 28662, 51503, 92374, 165796, 297284, 533858, 957252, 1718645, 3081790, 5533474, 9922064, 17814980, 31944528, 57356546, 102846820, 184661677, 331120454, 594527399, 1066057422]