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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.

A325553 Number of compositions of n with distinct circular differences up to sign.

Table of values

n a(n)
0 1
1 1
2 1
3 1
4 1
5 1
6 1
7 7
8 21
9 31
10 41
11 87
12 99
13 191
14 245
15 381
16 501
17 735
18 883
19 1309
20 1841
21 2589
22 3435
23 4941
24 6857
25 9791
26 13503
27 19475
28 27073
29 37175
30 52299
31 72249
32 100359
33 139317
34 190549
35 256769
36 355193
37 471963
38 644433
39 858793
40 1159161
41 1530879
42 2056073
43 2711921

List of values

[1, 1, 1, 1, 1, 1, 1, 7, 21, 31, 41, 87, 99, 191, 245, 381, 501, 735, 883, 1309, 1841, 2589, 3435, 4941, 6857, 9791, 13503, 19475, 27073, 37175, 52299, 72249, 100359, 139317, 190549, 256769, 355193, 471963, 644433, 858793, 1159161, 1530879, 2056073, 2711921]

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

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