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.

A230206 Trapezoid of dot products of row 3 (signs alternating) with sequential 4-tuples read by rows in Pascal's triangle A007318: T(n,k) is the linear combination of the 4-tuples (C(3,0), -C(3,1), C(3,2), -C(3,3)) and (C(n-1,k-3), C(n-1,k-2), C(n-1,k-1), C(n-1,k)), n >= 1, 0 <= k <= n+2.

Table of values

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

List of values

[-1, 3, -3, 1, -1, 2, 0, -2, 1, -1, 1, 2, -2, -1, 1, -1, 0, 3, 0, -3, 0, 1, -1, -1, 3, 3, -3, -3, 1, 1, -1, -2, 2, 6, 0, -6, -2, 2, 1, -1, -3, 0, 8, 6, -6, -8, 0, 3, 1, -1, -4, -3, 8, 14, 0, -14, -8, 3, 4, 1, -1, -5, -7, 5, 22, 14, -14, -22, -5, 7]