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.

A221216 T(n,k) = ((n+k)^2-2*(n+k)+4-(3*n+k-2)*(-1)^(n+k))/2; n , k > 0, read by antidiagonals.

Table of values

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

List of values

[1, 5, 6, 4, 3, 2, 12, 13, 14, 15, 11, 10, 9, 8, 7, 23, 24, 25, 26, 27, 28, 22, 21, 20, 19, 18, 17, 16, 38, 39, 40, 41, 42, 43, 44, 45, 37, 36, 35, 34, 33, 32, 31, 30, 29, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 56, 55, 54, 53, 52, 51, 50, 49, 48, 47, 46, 80]