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.

A213171 T(n,k) = ((k+n)^2 - 4*k + 3 - (-1)^n - (k+n)*(-1)^(k+n))/2; n, k > 0, read by antidiagonals.

Table of values

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

List of values

[1, 4, 5, 2, 3, 6, 9, 10, 13, 14, 7, 8, 11, 12, 15, 18, 19, 22, 23, 26, 27, 16, 17, 20, 21, 24, 25, 28, 31, 32, 35, 36, 39, 40, 43, 44, 29, 30, 33, 34, 37, 38, 41, 42, 45, 48, 49, 52, 53, 56, 57, 60, 61, 64, 65, 46, 47, 50, 51, 54, 55, 58, 59, 62, 63, 66, 69]