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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.

A143951 Number of Dyck paths such that the area between the x-axis and the path is n.

Table of values

n a(n)
0 1
1 1
2 1
3 1
4 2
5 3
6 4
7 6
8 9
9 14
10 21
11 31
12 47
13 71
14 107
15 161
16 243
17 367
18 553
19 834
20 1258
21 1898
22 2863
23 4318
24 6514
25 9827
26 14824
27 22361
28 33732
29 50886
30 76762
31 115796
32 174680
33 263509
34 397508
35 599647
36 904579
37 1364576
38 2058489
39 3105269
40 4684359
41 7066449
42 10659877
43 16080632
44 24257950
45 36593598
46 55202165
47 83273553
48 125619799
49 189499952

List of values

[1, 1, 1, 1, 2, 3, 4, 6, 9, 14, 21, 31, 47, 71, 107, 161, 243, 367, 553, 834, 1258, 1898, 2863, 4318, 6514, 9827, 14824, 22361, 33732, 50886, 76762, 115796, 174680, 263509, 397508, 599647, 904579, 1364576, 2058489, 3105269, 4684359, 7066449, 10659877, 16080632, 24257950, 36593598, 55202165, 83273553, 125619799, 189499952]

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

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