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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.

A369754 a(n) = n! * [x^n] exp(1 - (1+x)^n).

Table of values

n a(n)
0 1
1 -1
2 2
3 21
4 -104
5 -8245
6 -124344
7 7728581
8 757142912
9 21142327671
10 -3194024271200
11 -589138966169611
12 -38768504982354432
13 4948651031184677219
14 2022468386748039472256
15 303711906641250589741125
16 -7986432746850744238505984
17 -19535207301291993249120303121

List of values

[1, -1, 2, 21, -104, -8245, -124344, 7728581, 757142912, 21142327671, -3194024271200, -589138966169611, -38768504982354432, 4948651031184677219, 2022468386748039472256, 303711906641250589741125, -7986432746850744238505984, -19535207301291993249120303121]

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

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