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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.

A056481 Number of primitive (aperiodic) palindromic structures using exactly two different symbols.

Table of values

n a(n)
0 0
1 0
2 0
3 1
4 1
5 3
6 2
7 7
8 6
9 14
10 12
11 31
12 27
13 63
14 56
15 123
16 120
17 255
18 238
19 511
20 495
21 1015
22 992
23 2047
24 2010
25 4092
26 4032
27 8176
28 8127
29 16383
30 16242
31 32767
32 32640
33 65503
34 65280
35 131061
36 130788
37 262143
38 261632
39 524223
40 523770
41 1048575
42 1047494
43 2097151
44 2096127
45 4194162

List of values

[0, 0, 0, 1, 1, 3, 2, 7, 6, 14, 12, 31, 27, 63, 56, 123, 120, 255, 238, 511, 495, 1015, 992, 2047, 2010, 4092, 4032, 8176, 8127, 16383, 16242, 32767, 32640, 65503, 65280, 131061, 130788, 262143, 261632, 524223, 523770, 1048575, 1047494, 2097151, 2096127, 4194162]

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

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