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.

A260837 Number of (n+2)X(4+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00010101.

Table of values

n a(n)
1 364
2 496
3 1224
4 2235
5 2590
6 6232
7 13170
8 17731
9 34192
10 77780
11 123488
12 206695
13 457440
14 825256
15 1336836
16 2725379
17 5298108
18 8851516
19 16674798
20 33192375
21 58277638
22 104857040
23 206110260
24 377809047
25 671142648
26 1283474236
27 2413960656

List of values

[364, 496, 1224, 2235, 2590, 6232, 13170, 17731, 34192, 77780, 123488, 206695, 457440, 825256, 1336836, 2725379, 5298108, 8851516, 16674798, 33192375, 58277638, 104857040, 206110260, 377809047, 671142648, 1283474236, 2413960656]