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.

A351018 Number of integer compositions of n with all distinct even-indexed parts and all distinct odd-indexed parts.

Table of values

n a(n)
0 1
1 1
2 2
3 3
4 6
5 9
6 18
7 27
8 46
9 77
10 122
11 191
12 326
13 497
14 786
15 1207
16 1942
17 2905
18 4498
19 6703
20 10574
21 15597
22 23754
23 35043
24 52422
25 78369
26 115522
27 169499
28 248150
29 360521
30 532466
31 768275
32 1116126
33 1606669
34 2314426
35 3301879
36 4777078
37 6772657
38 9677138
39 13688079
40 19406214

List of values

[1, 1, 2, 3, 6, 9, 18, 27, 46, 77, 122, 191, 326, 497, 786, 1207, 1942, 2905, 4498, 6703, 10574, 15597, 23754, 35043, 52422, 78369, 115522, 169499, 248150, 360521, 532466, 768275, 1116126, 1606669, 2314426, 3301879, 4777078, 6772657, 9677138, 13688079, 19406214]

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

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