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 | 6 |
4 | 28 |
5 | 180 |
6 | 1446 |
7 | 13888 |
8 | 156472 |
9 | 2034000 |
10 | 29724490 |
11 | 476806176 |
12 | 8502508884 |
13 | 174802753216 |
14 | 3768345692398 |
15 | 63300353418240 |
16 | 1386349221087856 |
17 | 149879079531401472 |
18 | 5097575010920072850 |
19 | -780487993325688128000 |
20 | -32524149870689487270260 |
21 | 10927977097616993825596416 |
22 | 490896441869732669067535414 |
23 | -213936255246865273137807851520 |
24 | -10450262329586550037066790750808 |
25 | 6047981224337998054714885264691200 |