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.
n | a(n) |
---|---|
1 | 1 |
2 | -2 |
3 | 20 |
4 | -520 |
5 | 26000 |
6 | -2132000 |
7 | 260104000 |
8 | -44217680000 |
9 | 9993195680000 |
10 | -2898026747200000 |
11 | 1049085682486400000 |
12 | -463695871658988800000 |
13 | 245758811979264064000000 |
14 | -153845016299019304064000000 |
15 | 112306861898284091966720000000 |
16 | -94562377718355205435978240000000 |
17 | 90969007365057707629411066880000000 |