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.

A243778 Number of Dyck paths of semilength n having exactly nine (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
15 740
16 0
17 0
18 0
19 0
20 0
21 4655685
22 19546
23 0
24 0
25 1747955
26 0
27 20759960
28 167960
29 110
30 0
31 17405076899616
32 0
33 0
34 261107026
35 11058883809
36 17817753939932
37 2065690806135
38 180987639660985
39 533693067696
40 45880541850
41 2285677991937600
42 16275024211846481596

List of values

[1, 0, 0, 0, 0, 740, 0, 0, 0, 0, 0, 4655685, 19546, 0, 0, 1747955, 0, 20759960, 167960, 110, 0, 17405076899616, 0, 0, 261107026, 11058883809, 17817753939932, 2065690806135, 180987639660985, 533693067696, 45880541850, 2285677991937600, 16275024211846481596]