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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.

A348063 Coefficient of x^2 in expansion of n!* Sum_{k=0..n} binomial(x,k).

Table of values

n a(n)
2 1
3 0
4 11
5 5
6 304
7 364
8 15980
9 34236
10 1368936
11 4429656
12 173699712
13 771653376
14 30605906304
15 175622947200
16 7149130156800
17 50800930272000
18 2137822335475200
19 18241636315507200
20 796397873127782400
21 7971407298921830400
22 361615771356450508800
23 4168685961862906982400
24 196587429737202833817600

List of values

[1, 0, 11, 5, 304, 364, 15980, 34236, 1368936, 4429656, 173699712, 771653376, 30605906304, 175622947200, 7149130156800, 50800930272000, 2137822335475200, 18241636315507200, 796397873127782400, 7971407298921830400, 361615771356450508800, 4168685961862906982400, 196587429737202833817600]

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

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