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.

A220195 Sum of neighbor maps: log base 2 of the number of n X n binary arrays indicating the locations of corresponding elements equal to the sum mod 2 of their horizontal and vertical neighbors in a random 0..1 n X n array.

Table of values

n a(n)
1 1
2 4
3 9
4 12
5 23
6 36
7 49
8 64
9 73
10 100
11 115
12 144
13 169
14 192
15 225
16 248
17 287
18 324
19 345
20 400
21 441
22 484
23 515
24 572
25 625
26 676
27 729
28 784
29 831
30 880
31 961
32 1004
33 1073
34 1152
35 1219
36 1296
37 1369
38 1444
39 1489
40 1600
41 1679
42 1764
43 1849
44 1932
45 2025
46 2116
47 2179
48 2304
49 2393
50 2492

List of values

[1, 4, 9, 12, 23, 36, 49, 64, 73, 100, 115, 144, 169, 192, 225, 248, 287, 324, 345, 400, 441, 484, 515, 572, 625, 676, 729, 784, 831, 880, 961, 1004, 1073, 1152, 1219, 1296, 1369, 1444, 1489, 1600, 1679, 1764, 1849, 1932, 2025, 2116, 2179, 2304, 2393, 2492]