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.

A168619 Triangle T(n,k) read by rows with the coefficient [x^k] of the polynomial (x+1)^n + (2*n-3) *( (x+1)^n -x^n -1 ) in column k, row n.

Table of values

n a(n)
0 1
1 1
2 1
3 1
4 4
5 1
6 1
7 12
8 12
9 1
10 1
11 24
12 36
13 24
14 1
15 1
16 40
17 80
18 80
19 40
20 1
21 1
22 60
23 150
24 200
25 150
26 60
27 1
28 1
29 84
30 252
31 420
32 420
33 252
34 84
35 1
36 1
37 112
38 392
39 784
40 980
41 784
42 392
43 112
44 1
45 1
46 144
47 576
48 1344
49 2016
50 2016
51 1344
52 576
53 144
54 1
55 1
56 180
57 810
58 2160
59 3780
60 4536
61 3780
62 2160
63 810

List of values

[1, 1, 1, 1, 4, 1, 1, 12, 12, 1, 1, 24, 36, 24, 1, 1, 40, 80, 80, 40, 1, 1, 60, 150, 200, 150, 60, 1, 1, 84, 252, 420, 420, 252, 84, 1, 1, 112, 392, 784, 980, 784, 392, 112, 1, 1, 144, 576, 1344, 2016, 2016, 1344, 576, 144, 1, 1, 180, 810, 2160, 3780, 4536, 3780, 2160, 810]