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.

A207543 Triangle read by rows, expansion of (1+y*x)/(1-2*y*x+y*(y-1)*x^2).

Table of values

n a(n)
0 1
1 0
2 3
3 0
4 1
5 5
6 0
7 0
8 5
9 7
10 0
11 0
12 1
13 14
14 9
15 0
16 0
17 0
18 7
19 30
20 11
21 0
22 0
23 0
24 1
25 27
26 55
27 13
28 0
29 0
30 0
31 0
32 9
33 77
34 91
35 15
36 0
37 0
38 0
39 0
40 1
41 44
42 182
43 140
44 17
45 0
46 0
47 0
48 0
49 0
50 11
51 156
52 378
53 204
54 19
55 0
56 0
57 0
58 0
59 0
60 1
61 65
62 450
63 714
64 285
65 21
66 0

List of values

[1, 0, 3, 0, 1, 5, 0, 0, 5, 7, 0, 0, 1, 14, 9, 0, 0, 0, 7, 30, 11, 0, 0, 0, 1, 27, 55, 13, 0, 0, 0, 0, 9, 77, 91, 15, 0, 0, 0, 0, 1, 44, 182, 140, 17, 0, 0, 0, 0, 0, 11, 156, 378, 204, 19, 0, 0, 0, 0, 0, 1, 65, 450, 714, 285, 21, 0]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement.