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.

A104967 Matrix inverse of triangle A104219, read by rows, where A104219(n,k) equals the number of Schroeder paths of length 2n having k peaks at height 1.

Table of values

n a(n)
0 1
1 -1
2 1
3 -1
4 -2
5 1
6 -1
7 -1
8 -3
9 1
10 -1
11 0
12 0
13 -4
14 1
15 -1
16 1
17 2
18 2
19 -5
20 1
21 -1
22 2
23 3
24 4
25 5
26 -6
27 1
28 -1
29 3
30 3
31 3
32 5
33 9
34 -7
35 1
36 -1
37 4
38 2
39 0
40 0
41 4
42 14
43 -8
44 1
45 -1
46 5
47 0
48 -4
49 -6
50 -6
51 0
52 20
53 -9
54 1
55 -1
56 6
57 -3
58 -8
59 -10
60 -12
61 -14
62 -8
63 27
64 -10
65 1
66 -1
67 7
68 -7
69 -11
70 -10
71 -10
72 -14
73 -22
74 -21
75 35
76 -11
77 1
78 -1
79 8
80 -12
81 -12
82 -5
83 0
84 0
85 -8
86 -27
87 -40
88 44
89 -12
90 1

List of values

[1, -1, 1, -1, -2, 1, -1, -1, -3, 1, -1, 0, 0, -4, 1, -1, 1, 2, 2, -5, 1, -1, 2, 3, 4, 5, -6, 1, -1, 3, 3, 3, 5, 9, -7, 1, -1, 4, 2, 0, 0, 4, 14, -8, 1, -1, 5, 0, -4, -6, -6, 0, 20, -9, 1, -1, 6, -3, -8, -10, -12, -14, -8, 27, -10, 1, -1, 7, -7, -11, -10, -10, -14, -22, -21, 35, -11, 1, -1, 8, -12, -12, -5, 0, 0, -8, -27, -40, 44, -12, 1]