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.

A167635 Number of Dyck paths of semilength n, having no ascents and no descents of length 1, and having no peaks at odd level.

Table of values

n a(n)
0 1
1 0
2 1
3 0
4 2
5 0
6 5
7 1
8 14
9 7
10 43
11 36
12 143
13 166
14 509
15 731
16 1915
17 3158
18 7523
19 13560
20 30537
21 58257
22 127029
23 251266
24 538253
25 1089666
26 2313121
27 4754148
28 10051130
29 20868070
30 44065633
31 92132176
32 194617333
33 408971295
34 864899013
35 1824485600
36 3864369141

List of values

[1, 0, 1, 0, 2, 0, 5, 1, 14, 7, 43, 36, 143, 166, 509, 731, 1915, 3158, 7523, 13560, 30537, 58257, 127029, 251266, 538253, 1089666, 2313121, 4754148, 10051130, 20868070, 44065633, 92132176, 194617333, 408971295, 864899013, 1824485600, 3864369141]

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

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