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.

A008556 Triangle of coefficients of Legendre polynomials 2^n P_n (x).

Table of values

n a(n)
0 1
1 2
2 6
3 2
4 20
5 12
6 70
7 60
8 6
9 252
10 280
11 60
12 924
13 1260
14 420
15 20
16 3432
17 5544
18 2520
19 280
20 12870
21 24024
22 13860
23 2520
24 70
25 48620
26 102960
27 72072
28 18480
29 1260
30 184756
31 437580
32 360360
33 120120
34 13860
35 252
36 705432
37 1847560
38 1750320
39 720720
40 120120
41 5544

List of values

[1, 2, 6, 2, 20, 12, 70, 60, 6, 252, 280, 60, 924, 1260, 420, 20, 3432, 5544, 2520, 280, 12870, 24024, 13860, 2520, 70, 48620, 102960, 72072, 18480, 1260, 184756, 437580, 360360, 120120, 13860, 252, 705432, 1847560, 1750320, 720720, 120120, 5544]