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.

A285722 Square array A(n,k) read by antidiagonals, A(n,n) = 0, otherwise, if n > k, A(n,k) = T(n-k,k), else A(n,k) = T(n,k-n), where T(n,k) is sequence A000027 considered as a two-dimensional table.

Table of values

n a(n)
1 0
2 1
3 1
4 2
5 0
6 3
7 4
8 3
9 2
10 6
11 7
12 5
13 0
14 5
15 10
16 11
17 8
18 6
19 4
20 9
21 15
22 16
23 12
24 9
25 0
26 8
27 14
28 21
29 22
30 17
31 13
32 10
33 7
34 13
35 20
36 28
37 29
38 23
39 18
40 14
41 0
42 12
43 19
44 27
45 36
46 37
47 30
48 24
49 19
50 15
51 11
52 18
53 26
54 35
55 45
56 46
57 38
58 31
59 25
60 20
61 0
62 17
63 25
64 34
65 44
66 55
67 56
68 47
69 39
70 32
71 26
72 21
73 16
74 24
75 33
76 43
77 54
78 66
79 67
80 57
81 48
82 40
83 33
84 27
85 0
86 23
87 32
88 42
89 53
90 65
91 78
92 79
93 68
94 58
95 49
96 41
97 34
98 28
99 22
100 31
101 41
102 52
103 64
104 77
105 91

List of values

[0, 1, 1, 2, 0, 3, 4, 3, 2, 6, 7, 5, 0, 5, 10, 11, 8, 6, 4, 9, 15, 16, 12, 9, 0, 8, 14, 21, 22, 17, 13, 10, 7, 13, 20, 28, 29, 23, 18, 14, 0, 12, 19, 27, 36, 37, 30, 24, 19, 15, 11, 18, 26, 35, 45, 46, 38, 31, 25, 20, 0, 17, 25, 34, 44, 55, 56, 47, 39, 32, 26, 21, 16, 24, 33, 43, 54, 66, 67, 57, 48, 40, 33, 27, 0, 23, 32, 42, 53, 65, 78, 79, 68, 58, 49, 41, 34, 28, 22, 31, 41, 52, 64, 77, 91]