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.

A216249 T(n,k) = ((n+k)^2-4*k+3-2*(-1)^n+(-1)^k-(n+k-4)*(-1)^(n+k))/2-2, if k=1 and (n mod 2)=1; T(n,k)=((n+k)^2-4*k+3-2*(-1)^n+(-1)^k-(n+k-4)*(-1)^(n+k))/2, else. Table T(n,k) read by antidiagonals; n , k > 0.

Table of values

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

List of values

[1, 3, 2, 4, 5, 6, 8, 7, 12, 11, 9, 10, 13, 14, 15, 17, 16, 21, 20, 25, 24, 18, 19, 22, 23, 26, 27, 28, 30, 29, 34, 33, 38, 37, 42, 41, 31, 32, 35, 36, 39, 40, 43, 44, 45, 47, 46, 51, 50, 55, 54, 59, 58, 63, 62, 48, 49, 52, 53, 56, 57, 60, 61, 64, 65, 66, 68, 67, 72, 71, 76, 75, 80, 79, 84, 83, 88, 87]