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.

A307883 Square array read by descending antidiagonals: T(n, k) where column k is the expansion of 1/sqrt(1 - 2*(k+1)*x + ((k-1)*x)^2).

Table of values

n a(n)
0 1
1 1
2 1
3 1
4 2
5 1
6 1
7 3
8 6
9 1
10 1
11 4
12 13
13 20
14 1
15 1
16 5
17 22
18 63
19 70
20 1
21 1
22 6
23 33
24 136
25 321
26 252
27 1
28 1
29 7
30 46
31 245
32 886
33 1683
34 924
35 1
36 1
37 8
38 61
39 396
40 1921
41 5944
42 8989
43 3432
44 1
45 1
46 9
47 78
48 595
49 3606
50 15525
51 40636
52 48639
53 12870
54 1
55 1
56 10
57 97
58 848
59 6145
60 33876
61 127905
62 281488
63 265729
64 48620
65 1

List of values

[1, 1, 1, 1, 2, 1, 1, 3, 6, 1, 1, 4, 13, 20, 1, 1, 5, 22, 63, 70, 1, 1, 6, 33, 136, 321, 252, 1, 1, 7, 46, 245, 886, 1683, 924, 1, 1, 8, 61, 396, 1921, 5944, 8989, 3432, 1, 1, 9, 78, 595, 3606, 15525, 40636, 48639, 12870, 1, 1, 10, 97, 848, 6145, 33876, 127905, 281488, 265729, 48620, 1]