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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.

A342330 Number of compositions of n with all adjacent parts (x,y) satisfying x < 2y and y < 2x.

Table of values

n a(n)
0 1
1 1
2 2
3 2
4 3
5 4
6 4
7 7
8 9
9 11
10 17
11 23
12 32
13 44
14 63
15 91
16 127
17 180
18 255
19 363
20 516
21 732
22 1044
23 1485
24 2109
25 3002
26 4277
27 6089
28 8660
29 12323
30 17550
31 24986
32 35562
33 50628
34 72084
35 102616
36 146077
37 207980
38 296114
39 421555
40 600153
41 854469
42 1216543
43 1731983
44 2465842
45 3510713

List of values

[1, 1, 2, 2, 3, 4, 4, 7, 9, 11, 17, 23, 32, 44, 63, 91, 127, 180, 255, 363, 516, 732, 1044, 1485, 2109, 3002, 4277, 6089, 8660, 12323, 17550, 24986, 35562, 50628, 72084, 102616, 146077, 207980, 296114, 421555, 600153, 854469, 1216543, 1731983, 2465842, 3510713]

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

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