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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.

A122610 Triangle read by rows: T(n,k) is coefficient of x^k in Sum_{m=0..n} x^m*(1-x)^(n-m)*(-1)^[(m+1)/2]*binomial(m-[(m+1)/2],[m/2]).

Table of values

n a(n)
0 1
1 1
2 -2
3 1
4 -3
5 1
6 1
7 -4
8 3
9 1
10 1
11 -5
12 6
13 1
14 -2
15 1
16 -6
17 10
18 -1
19 -6
20 1
21 1
22 -7
23 15
24 -6
25 -11
26 6
27 1
28 1
29 -8
30 21
31 -15
32 -15
33 18
34 1
35 -2
36 1
37 -9
38 28
39 -29
40 -15
41 39
42 -6
43 -9
44 1
45 1
46 -10
47 36
48 -49
49 -7
50 69
51 -30
52 -21
53 9
54 1
55 1
56 -11
57 45
58 -76
59 14
60 105
61 -84
62 -30
63 36
64 1
65 -2
66 1
67 -12
68 55
69 -111
70 54
71 140
72 -182
73 -15
74 96
75 -14
76 -12
77 1
78 1
79 -13
80 66
81 -155

List of values

[1, 1, -2, 1, -3, 1, 1, -4, 3, 1, 1, -5, 6, 1, -2, 1, -6, 10, -1, -6, 1, 1, -7, 15, -6, -11, 6, 1, 1, -8, 21, -15, -15, 18, 1, -2, 1, -9, 28, -29, -15, 39, -6, -9, 1, 1, -10, 36, -49, -7, 69, -30, -21, 9, 1, 1, -11, 45, -76, 14, 105, -84, -30, 36, 1, -2, 1, -12, 55, -111, 54, 140, -182, -15, 96, -14, -12, 1, 1, -13, 66, -155]