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.

A221215 T(n,k)= ((n+k)^2-2*(n+k)+4-(n+3*k-2)*(-1)^(n+k))/2; n , k > 0, read by antidiagonals.

Table of values

n a(n)
1 1
2 6
3 5
4 2
5 3
6 4
7 15
8 14
9 13
10 12
11 7
12 8
13 9
14 10
15 11
16 28
17 27
18 26
19 25
20 24
21 23
22 16
23 17
24 18
25 19
26 20
27 21
28 22
29 45
30 44
31 43
32 42
33 41
34 40
35 39
36 38
37 29
38 30
39 31
40 32
41 33
42 34
43 35
44 36
45 37
46 66
47 65
48 64
49 63
50 62
51 61
52 60
53 59
54 58
55 57
56 46
57 47
58 48
59 49
60 50
61 51
62 52
63 53
64 54
65 55
66 56
67 91

List of values

[1, 6, 5, 2, 3, 4, 15, 14, 13, 12, 7, 8, 9, 10, 11, 28, 27, 26, 25, 24, 23, 16, 17, 18, 19, 20, 21, 22, 45, 44, 43, 42, 41, 40, 39, 38, 29, 30, 31, 32, 33, 34, 35, 36, 37, 66, 65, 64, 63, 62, 61, 60, 59, 58, 57, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 91]