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 | -3320 |
5 | -1598960 |
6 | -1757280800 |
7 | -3687555924800 |
8 | -13169930119702400 |
9 | -73877683147510880000 |
10 | -613509458527719828800000 |
11 | -7207218902820454669458560000 |
12 | -115535941439664355284062432000000 |
13 | -2454583328787383660694513356633600000 |
14 | -67459240631654340522067311327301145600000 |