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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.

A330907 Denominator of the variance of the random number of comparisons in quicksort applied to lists of length n.

Table of values

n a(n)
0 1
1 1
2 1
3 9
4 36
5 25
6 900
7 11025
8 19600
9 15876
10 317520
11 53361
12 38419920
13 33127380
14 144288144
15 2029052025
16 129859329600
17 115831315600
18 37529346254400
19 33870234994596
20 6144260316480
21 799769421360
22 387088399938240
23 355503061748835
24 40953952713465792
25 37864231428870000
26 316002721554520000
27 2056839142975402500
28 1612561888092715560000

List of values

[1, 1, 1, 9, 36, 25, 900, 11025, 19600, 15876, 317520, 53361, 38419920, 33127380, 144288144, 2029052025, 129859329600, 115831315600, 37529346254400, 33870234994596, 6144260316480, 799769421360, 387088399938240, 355503061748835, 40953952713465792, 37864231428870000, 316002721554520000, 2056839142975402500, 1612561888092715560000]

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

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