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.

A118981 Triangle read by rows: T(n,k) = abs( A104509(n-1,n-k) ).

Table of values

n a(n)
1 1
2 1
3 1
4 1
5 2
6 3
7 1
8 3
9 6
10 4
11 1
12 4
13 10
14 12
15 7
16 1
17 5
18 15
19 25
20 25
21 11
22 1
23 6
24 21
25 44
26 60
27 48
28 18
29 1
30 7
31 28
32 70
33 119
34 133
35 91
36 29
37 1
38 8
39 36
40 104
41 210
42 296
43 284
44 168
45 47
46 1
47 9
48 45
49 147
50 342
51 576
52 699
53 585
54 306
55 76
56 1
57 10
58 55
59 200
60 525
61 1022
62 1485
63 1580
64 1175
65 550
66 123

List of values

[1, 1, 1, 1, 2, 3, 1, 3, 6, 4, 1, 4, 10, 12, 7, 1, 5, 15, 25, 25, 11, 1, 6, 21, 44, 60, 48, 18, 1, 7, 28, 70, 119, 133, 91, 29, 1, 8, 36, 104, 210, 296, 284, 168, 47, 1, 9, 45, 147, 342, 576, 699, 585, 306, 76, 1, 10, 55, 200, 525, 1022, 1485, 1580, 1175, 550, 123]