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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.

A298816 a(n) is the binary XOR of all n-bit squares, with a(2)=0 indicating that no 2-bit squares exist.

Table of values

n a(n)
1 1
2 0
3 4
4 9
5 9
6 21
7 12
8 28
9 449
10 577
11 357
12 997
13 6085
14 14533
15 12517
16 15077
17 121125
18 152869
19 400028
20 1041052
21 1290704
22 2556368
23 4913664
24 11950592
25 22421376
26 63692672
27 7674753
28 78355329
29 312723717
30 656197893
31 1089399836
32 2723474460
33 4196236289
34 2416016385
35 8186515468

List of values

[1, 0, 4, 9, 9, 21, 12, 28, 449, 577, 357, 997, 6085, 14533, 12517, 15077, 121125, 152869, 400028, 1041052, 1290704, 2556368, 4913664, 11950592, 22421376, 63692672, 7674753, 78355329, 312723717, 656197893, 1089399836, 2723474460, 4196236289, 2416016385, 8186515468]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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