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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.

A351009 Numbers k such that the k-th composition in standard order is a concatenation of distinct twins (x,x).

Table of values

n a(n)
1 0
2 3
3 10
4 36
5 43
6 58
7 136
8 147
9 228
10 528
11 547
12 586
13 676
14 904
15 2080
16 2115
17 2186
18 2347
19 2362
20 2696
21 2707
22 2788
23 3600
24 3658
25 3748
26 8256
27 8323
28 8458
29 8740
30 8747
31 8762
32 9352
33 10768
34 10787
35 11144
36 14368
37 14474
38 14984
39 32896
40 33027
41 33290
42 33828
43 33835
44 33850
45 34963

List of values

[0, 3, 10, 36, 43, 58, 136, 147, 228, 528, 547, 586, 676, 904, 2080, 2115, 2186, 2347, 2362, 2696, 2707, 2788, 3600, 3658, 3748, 8256, 8323, 8458, 8740, 8747, 8762, 9352, 10768, 10787, 11144, 14368, 14474, 14984, 32896, 33027, 33290, 33828, 33835, 33850, 34963]

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

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