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.

A181089 Triangle T(n, k) = A060821(n,k) + A060821(n,n-k), read by rows.

Table of values

n a(n)
0 2
1 2
2 2
3 2
4 0
5 2
6 8
7 -12
8 -12
9 8
10 28
11 0
12 -96
13 0
14 28
15 32
16 120
17 -160
18 -160
19 120
20 32
21 -56
22 0
23 240
24 0
25 240
26 0
27 -56
28 128
29 -1680
30 -1344
31 3360
32 3360
33 -1344
34 -1680
35 128
36 1936
37 0
38 -17024
39 0
40 26880
41 0
42 -17024
43 0
44 1936
45 512
46 30240
47 -9216
48 -80640
49 48384
50 48384
51 -80640
52 -9216
53 30240
54 512

List of values

[2, 2, 2, 2, 0, 2, 8, -12, -12, 8, 28, 0, -96, 0, 28, 32, 120, -160, -160, 120, 32, -56, 0, 240, 0, 240, 0, -56, 128, -1680, -1344, 3360, 3360, -1344, -1680, 128, 1936, 0, -17024, 0, 26880, 0, -17024, 0, 1936, 512, 30240, -9216, -80640, 48384, 48384, -80640, -9216, 30240, 512]

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

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