cp's OEIS Frontend

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.

A089043 a(n) = n!^2 + (-1)^n.

Table of values

n a(n)
1 0
2 5
3 35
4 577
5 14399
6 518401
7 25401599
8 1625702401
9 131681894399
10 13168189440001
11 1593350922239999
12 229442532802560001
13 38775788043632639999
14 7600054456551997440001
15 1710012252724199423999999
16 437763136697395052544000001
17 126513546505547170185215999999

List of values

[0, 5, 35, 577, 14399, 518401, 25401599, 1625702401, 131681894399, 13168189440001, 1593350922239999, 229442532802560001, 38775788043632639999, 7600054456551997440001, 1710012252724199423999999, 437763136697395052544000001, 126513546505547170185215999999]

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

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