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.

A243777 Number of Dyck paths of semilength n having exactly eight (possibly overlapping) occurrences of the consecutive step pattern given by the binary expansion of n, where 1=U=(1,1) and 0=D=(1,-1).

Table of values

n a(n)
10 1
11 0
12 0
13 0
14 0
15 3780
16 0
17 0
18 46
19 20
20 0
21 16356705
22 910111
23 0
24 1430
25 45077670
26 755820
27 518221227
28 101454300
29 1479060
30 0
31 43816171893552
32 0
33 420732
34 54663267285
35 583180547204
36 181720848039484
37 60770152697265
38 2020797438130380
39 52163677215449
40 31943272670595

List of values

[1, 0, 0, 0, 0, 3780, 0, 0, 46, 20, 0, 16356705, 910111, 0, 1430, 45077670, 755820, 518221227, 101454300, 1479060, 0, 43816171893552, 0, 420732, 54663267285, 583180547204, 181720848039484, 60770152697265, 2020797438130380, 52163677215449, 31943272670595]