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.

A238432 Number of compositions of n avoiding equidistant 3-term arithmetic progressions.

Table of values

n a(n)
0 1
1 1
2 2
3 3
4 7
5 13
6 22
7 41
8 74
9 133
10 233
11 400
12 714
13 1209
14 2091
15 3591
16 6089
17 10316
18 17477
19 29413
20 49515
21 82474
22 137659
23 228461
24 377936
25 623710
26 1025445
27 1680418
28 2746242
29 4474654
30 7270430
31 11774128
32 19020802
33 30640812
34 49222427
35 78857338
36 126033488
37 200872080

List of values

[1, 1, 2, 3, 7, 13, 22, 41, 74, 133, 233, 400, 714, 1209, 2091, 3591, 6089, 10316, 17477, 29413, 49515, 82474, 137659, 228461, 377936, 623710, 1025445, 1680418, 2746242, 4474654, 7270430, 11774128, 19020802, 30640812, 49222427, 78857338, 126033488, 200872080]

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

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