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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.

A335088 a(n) = n! * [x^n] exp(Sum_{k=1..n, gcd(n,k) = 1} x^k / k).

Table of values

n a(n)
0 1
1 1
2 1
3 4
4 9
5 96
6 145
7 4320
8 11025
9 179200
10 693441
11 36288000
12 62610625
13 5748019200
14 15259154625
15 378002200576
16 4108830350625
17 334764638208000
18 643373556450625
19 115242726703104000
20 309281197713168681
21 14870534508544000000
22 168541849294187630625

List of values

[1, 1, 1, 4, 9, 96, 145, 4320, 11025, 179200, 693441, 36288000, 62610625, 5748019200, 15259154625, 378002200576, 4108830350625, 334764638208000, 643373556450625, 115242726703104000, 309281197713168681, 14870534508544000000, 168541849294187630625]

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

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