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.

A197880 Squarefree part of ((2n-1)!)^(2n-3).

Table of values

n a(n)
1 1
2 6
3 30
4 35
5 70
6 77
7 3003
8 1430
9 24310
10 230945
11 969969
12 4056234
13 676039
14 312018
15 1292646
16 33393355
17 2203961430
18 90751353
19 3357800061
20 1531628098
21 156991880045
22 5786272150230
23 105204948186
24 107492012277
25 35830670759
26 3654728417418
27 14900046624858

List of values

[1, 6, 30, 35, 70, 77, 3003, 1430, 24310, 230945, 969969, 4056234, 676039, 312018, 1292646, 33393355, 2203961430, 90751353, 3357800061, 1531628098, 156991880045, 5786272150230, 105204948186, 107492012277, 35830670759, 3654728417418, 14900046624858]

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

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