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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.

A203155 (n-1)-st elementary symmetric function of {3, 3, 4, 4, 5, 5,..., Floor[(n+5)/2]}.

Table of values

n a(n)
1 1
2 6
3 33
4 168
5 984
6 5640
7 37440
8 246240
9 1853280
10 13880160
11 117391680
12 989936640
13 9315855360
14 87500528640
15 907925760000
16 9408462336000
17 106785133056000
18 1210848984576000
19 14928525545472000
20 183922359312384000
21 2448351304261632000

List of values

[1, 6, 33, 168, 984, 5640, 37440, 246240, 1853280, 13880160, 117391680, 989936640, 9315855360, 87500528640, 907925760000, 9408462336000, 106785133056000, 1210848984576000, 14928525545472000, 183922359312384000, 2448351304261632000]

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

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