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.

A104041 Triangular matrix T, read by rows, such that column k is equal (in absolute value) to row (k-1) in the matrix inverse T^-1 (with extrapolated zeros) for k>0, with T(n,n)=1 (n>=0) and T(n,n-1)=-n (n>=1).

Table of values

n a(n)
0 1
1 -1
2 1
3 0
4 -2
5 1
6 0
7 2
8 -3
9 1
10 0
11 0
12 4
13 -4
14 1
15 0
16 0
17 -4
18 8
19 -5
20 1
21 0
22 0
23 0
24 -8
25 12
26 -6
27 1
28 0
29 0
30 0
31 8
32 -20
33 18
34 -7
35 1
36 0
37 0
38 0
39 0
40 16
41 -32
42 24
43 -8
44 1
45 0
46 0
47 0
48 0
49 -16
50 48
51 -56
52 32
53 -9
54 1
55 0
56 0
57 0
58 0
59 0
60 -32
61 80
62 -80
63 40
64 -10
65 1
66 0
67 0
68 0
69 0
70 0
71 32
72 -112
73 160
74 -120
75 50
76 -11
77 1
78 0
79 0
80 0
81 0
82 0
83 0
84 64
85 -192
86 240
87 -160
88 60
89 -12
90 1

List of values

[1, -1, 1, 0, -2, 1, 0, 2, -3, 1, 0, 0, 4, -4, 1, 0, 0, -4, 8, -5, 1, 0, 0, 0, -8, 12, -6, 1, 0, 0, 0, 8, -20, 18, -7, 1, 0, 0, 0, 0, 16, -32, 24, -8, 1, 0, 0, 0, 0, -16, 48, -56, 32, -9, 1, 0, 0, 0, 0, 0, -32, 80, -80, 40, -10, 1, 0, 0, 0, 0, 0, 32, -112, 160, -120, 50, -11, 1, 0, 0, 0, 0, 0, 0, 64, -192, 240, -160, 60, -12, 1]