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.

A132733 Triangle T(n, k) = 4*binomial(n, k) - 5 with T(n, 0) = T(n, n) = 1, read by rows.

Table of values

n a(n)
0 1
1 1
2 1
3 1
4 3
5 1
6 1
7 7
8 7
9 1
10 1
11 11
12 19
13 11
14 1
15 1
16 15
17 35
18 35
19 15
20 1
21 1
22 19
23 55
24 75
25 55
26 19
27 1
28 1
29 23
30 79
31 135
32 135
33 79
34 23
35 1
36 1
37 27
38 107
39 219
40 275
41 219
42 107
43 27
44 1
45 1
46 31
47 139
48 331
49 499
50 499
51 331
52 139
53 31
54 1
55 1
56 35
57 175
58 475
59 835
60 1003
61 835
62 475
63 175
64 35
65 1

List of values

[1, 1, 1, 1, 3, 1, 1, 7, 7, 1, 1, 11, 19, 11, 1, 1, 15, 35, 35, 15, 1, 1, 19, 55, 75, 55, 19, 1, 1, 23, 79, 135, 135, 79, 23, 1, 1, 27, 107, 219, 275, 219, 107, 27, 1, 1, 31, 139, 331, 499, 499, 331, 139, 31, 1, 1, 35, 175, 475, 835, 1003, 835, 475, 175, 35, 1]