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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.

A159934 Triangle, row sums = d(n) = A000005(n): M * Q; where M = an infinite lower Toeplitz matrix with A159933 in every column. Q = an infinite lower triangular matrix with d(n) shifted: (1, 1, 2, 2, 3, 2, 4, ...) as the main diagonal and the rest zeros.

Table of values

n a(n)
1 1
2 1
3 1
4 -1
5 1
6 2
7 0
8 -1
9 2
10 2
11 -1
12 0
13 -2
14 2
15 3
16 2
17 -1
18 0
19 -2
20 3
21 2
22 -1
23 2
24 -2
25 0
26 -3
27 2
28 4
29 -1
30 -1
31 4
32 -2
33 0
34 -2
35 4
36 2
37 3
38 -1
39 -2
40 4
41 -3
42 0
43 -4
44 2
45 4
46 -4
47 3
48 -2
49 -2
50 6
51 -2
52 0
53 -2
54 4
55 3
56 2
57 -4
58 6
59 -2
60 -3
61 4
62 -4
63 0
64 -4
65 3
66 4

List of values

[1, 1, 1, -1, 1, 2, 0, -1, 2, 2, -1, 0, -2, 2, 3, 2, -1, 0, -2, 3, 2, -1, 2, -2, 0, -3, 2, 4, -1, -1, 4, -2, 0, -2, 4, 2, 3, -1, -2, 4, -3, 0, -4, 2, 4, -4, 3, -2, -2, 6, -2, 0, -2, 4, 3, 2, -4, 6, -2, -3, 4, -4, 0, -4, 3, 4]

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