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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.

A384024 a(n) = [x^n] Product_{k=0..n} (1 + (n+k)*x).

Table of values

n a(n)
0 1
1 3
2 26
3 342
4 5944
5 127860
6 3272688
7 97053936
8 3270729600
9 123418922400
10 5154170774400
11 235977273544320
12 11752173128586240
13 632474276804697600
14 36576553723886131200
15 2261980049125982976000
16 148956705206745595084800
17 10406288081667512679321600
18 768701832940487804295168000

List of values

[1, 3, 26, 342, 5944, 127860, 3272688, 97053936, 3270729600, 123418922400, 5154170774400, 235977273544320, 11752173128586240, 632474276804697600, 36576553723886131200, 2261980049125982976000, 148956705206745595084800, 10406288081667512679321600, 768701832940487804295168000]

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

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