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 | 120 |
| 2 | 772 |
| 3 | 4930 |
| 4 | 32636 |
| 5 | 217634 |
| 6 | 1457326 |
| 7 | 9772880 |
| 8 | 65582500 |
| 9 | 440223510 |
| 10 | 2955392154 |
| 11 | 19841767762 |
| 12 | 133216123406 |
| 13 | 894412534702 |
| 14 | 6005113336592 |
| 15 | 40318603143004 |
| 16 | 270701212074848 |
| 17 | 1817502901804920 |
| 18 | 12202817537105258 |
| 19 | 81930416102796122 |