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.

A286180 Square array A(n,k), n>=0, k>=0, read by antidiagonals, where column k is the expansion of (Product_{j>0} (1 + x^j) * (1 - x^(2*j)))^k in powers of x.

Table of values

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

List of values

[1, 1, 0, 1, 1, 0, 1, 2, 0, 0, 1, 3, 1, 1, 0, 1, 4, 3, 2, 0, 0, 1, 5, 6, 4, 2, 0, 0, 1, 6, 10, 8, 6, 0, 1, 0, 1, 7, 15, 15, 13, 3, 3, 0, 0, 1, 8, 21, 26, 25, 12, 6, 2, 0, 0, 1, 9, 28, 42, 45, 31, 14, 9, 0, 0, 0, 1, 10, 36, 64, 77, 66, 35, 24, 3, 2, 1, 0, 1, 11, 45]