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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.

A287993 Number of Dyck paths of semilength n such that all positive levels up to the highest level have a positive number of peaks and all the level peak numbers are distinct.

Table of values

n a(n)
0 1
1 1
2 1
3 1
4 6
5 10
6 21
7 52
8 147
9 564
10 1651
11 4440
12 12499
13 36853
14 116476
15 390774
16 1352215
17 4593736
18 15057127
19 48419013
20 156073723
21 511324062
22 1713185811
23 5878350249
24 20574046540
25 72771206715
26 257475113013
27 905430711156
28 3160767910928
29 10981916671027

List of values

[1, 1, 1, 1, 6, 10, 21, 52, 147, 564, 1651, 4440, 12499, 36853, 116476, 390774, 1352215, 4593736, 15057127, 48419013, 156073723, 511324062, 1713185811, 5878350249, 20574046540, 72771206715, 257475113013, 905430711156, 3160767910928, 10981916671027]

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

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