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.

A333303 T(n, k) = [x^k] (-2)^n*(B(n, x/2) - B(n, (x+1)/2)) where B(n, x) are the Bernoulli polynomials. Triangle read by rows, for 0 <= k <= n.

Table of values

n a(n)
0 0
1 1
2 1
3 -2
4 0
5 -3
6 3
7 -1
8 0
9 6
10 -4
11 0
12 5
13 0
14 -10
15 5
16 3
17 0
18 -15
19 0
20 15
21 -6
22 0
23 -21
24 0
25 35
26 0
27 -21
28 7
29 -17
30 0
31 84
32 0
33 -70
34 0
35 28
36 -8
37 0
38 153
39 0
40 -252
41 0
42 126
43 0
44 -36
45 9
46 155
47 0
48 -765
49 0
50 630
51 0
52 -210
53 0
54 45
55 -10
56 0
57 -1705
58 0
59 2805
60 0
61 -1386
62 0
63 330
64 0
65 -55
66 11

List of values

[0, 1, 1, -2, 0, -3, 3, -1, 0, 6, -4, 0, 5, 0, -10, 5, 3, 0, -15, 0, 15, -6, 0, -21, 0, 35, 0, -21, 7, -17, 0, 84, 0, -70, 0, 28, -8, 0, 153, 0, -252, 0, 126, 0, -36, 9, 155, 0, -765, 0, 630, 0, -210, 0, 45, -10, 0, -1705, 0, 2805, 0, -1386, 0, 330, 0, -55, 11]