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.

A142459 Triangle read by rows: T(n,k) = (4n-4k+1) * T(n-1,k-1) + (4k-3) * T(n-1,k).

Table of values

n a(n)
1 1
2 1
3 1
4 1
5 10
6 1
7 1
8 59
9 59
10 1
11 1
12 308
13 1062
14 308
15 1
16 1
17 1557
18 13562
19 13562
20 1557
21 1
22 1
23 7806
24 148527
25 352612
26 148527
27 7806
28 1
29 1
30 39055
31 1500669
32 7108915
33 7108915
34 1500669
35 39055
36 1
37 1
38 195304
39 14482396
40 123929944
41 241703110
42 123929944
43 14482396
44 195304
45 1

List of values

[1, 1, 1, 1, 10, 1, 1, 59, 59, 1, 1, 308, 1062, 308, 1, 1, 1557, 13562, 13562, 1557, 1, 1, 7806, 148527, 352612, 148527, 7806, 1, 1, 39055, 1500669, 7108915, 7108915, 1500669, 39055, 1, 1, 195304, 14482396, 123929944, 241703110, 123929944, 14482396, 195304, 1]