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.

A071676 Array read by antidiagonals of signed variant of trinomial coefficients with T(n,k)=T(n-1,k)+T(n-1,k-1)-T(n-1,k-2) starting with T(0,0)=1.

Table of values

n a(n)
0 1
1 0
2 1
3 0
4 1
5 1
6 0
7 -1
8 2
9 1
10 0
11 0
12 -1
13 3
14 1
15 0
16 0
17 -2
18 0
19 4
20 1
21 0
22 0
23 1
24 -5
25 2
26 5
27 1
28 0
29 0
30 0
31 0
32 -8
33 5
34 6
35 1
36 0
37 0
38 0
39 3
40 -5
41 -10
42 9
43 7
44 1
45 0
46 0
47 0
48 -1
49 8
50 -15
51 -10
52 14
53 8
54 1
55 0
56 0
57 0
58 0
59 2
60 11
61 -30
62 -7
63 20
64 9
65 1
66 0
67 0
68 0
69 0
70 -4
71 15
72 6
73 -49
74 0
75 27
76 10
77 1
78 0
79 0
80 0
81 0
82 1
83 -10
84 41
85 -14
86 -70
87 12
88 35
89 11
90 1
91 0
92 0
93 0
94 0
95 0
96 -5
97 -6
98 77
99 -56
100 -90
101 30
102 44

List of values

[1, 0, 1, 0, 1, 1, 0, -1, 2, 1, 0, 0, -1, 3, 1, 0, 0, -2, 0, 4, 1, 0, 0, 1, -5, 2, 5, 1, 0, 0, 0, 0, -8, 5, 6, 1, 0, 0, 0, 3, -5, -10, 9, 7, 1, 0, 0, 0, -1, 8, -15, -10, 14, 8, 1, 0, 0, 0, 0, 2, 11, -30, -7, 20, 9, 1, 0, 0, 0, 0, -4, 15, 6, -49, 0, 27, 10, 1, 0, 0, 0, 0, 1, -10, 41, -14, -70, 12, 35, 11, 1, 0, 0, 0, 0, 0, -5, -6, 77, -56, -90, 30, 44]