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.

A197208 Triangular array: T(n,k) = sqrt(C(n-1,k-1)*C(n-1,k)*C(n,k+1)* C(n+1,k+1)*C(n+1,k)*C(n,k-1)), where C(n,k) = binomial(n,k).

Table of values

n a(n)
2 3
3 12
4 12
5 30
6 120
7 30
8 60
9 600
10 600
11 60
12 105
13 2100
14 5250
15 2100
16 105
17 168
18 5880
19 29400
20 29400
21 5880
22 168
23 252
24 14112
25 123480
26 246960
27 123480
28 14112
29 252
30 360
31 30240
32 423360
33 1481760
34 1481760
35 423360
36 30240
37 360
38 495
39 59400
40 1247400
41 6985440
42 12224520
43 6985440
44 1247400
45 59400
46 495

List of values

[3, 12, 12, 30, 120, 30, 60, 600, 600, 60, 105, 2100, 5250, 2100, 105, 168, 5880, 29400, 29400, 5880, 168, 252, 14112, 123480, 246960, 123480, 14112, 252, 360, 30240, 423360, 1481760, 1481760, 423360, 30240, 360, 495, 59400, 1247400, 6985440, 12224520, 6985440, 1247400, 59400, 495]

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

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