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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.

A168052 Hankel transform of a Motzkin variant.

Table of values

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

List of values

[1, -1, 2, -3, 3, -4, 5, -5, 6, -7, 7, -8, 9, -9, 10, -11, 11, -12, 13, -13, 14, -15, 15, -16, 17, -17, 18, -19, 19, -20, 21, -21, 22, -23, 23, -24, 25, -25, 26, -27, 27, -28, 29, -29, 30, -31, 31, -32, 33, -33, 34, -35, 35, -36, 37, -37, 38, -39, 39, -40, 41, -41, 42, -43]

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