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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.

A131114 T(n,k) = 6*binomial(n,k) - 5*I(n,k), where I is the identity matrix; triangle T read by rows (n >= 0 and 0 <= k <= n).

Table of values

n a(n)
0 1
1 6
2 1
3 6
4 12
5 1
6 6
7 18
8 18
9 1
10 6
11 24
12 36
13 24
14 1
15 6
16 30
17 60
18 60
19 30
20 1
21 6
22 36
23 90
24 120
25 90
26 36
27 1
28 6
29 42
30 126
31 210
32 210
33 126
34 42
35 1
36 6
37 48
38 168
39 336
40 420
41 336
42 168
43 48
44 1
45 6
46 54
47 216
48 504
49 756
50 756
51 504
52 216
53 54
54 1

List of values

[1, 6, 1, 6, 12, 1, 6, 18, 18, 1, 6, 24, 36, 24, 1, 6, 30, 60, 60, 30, 1, 6, 36, 90, 120, 90, 36, 1, 6, 42, 126, 210, 210, 126, 42, 1, 6, 48, 168, 336, 420, 336, 168, 48, 1, 6, 54, 216, 504, 756, 756, 504, 216, 54, 1]

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

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