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) |
|---|---|
| 0 | 2186 |
| 1 | 75938 |
| 2 | 745418 |
| 3 | 3959426 |
| 4 | 14704202 |
| 5 | 43261346 |
| 6 | 108110858 |
| 7 | 239479298 |
| 8 | 483533066 |
| 9 | 907216802 |
| 10 | 1603736906 |
| 11 | 2698690178 |
| 12 | 4356837578 |
| 13 | 6789523106 |
| 14 | 10262737802 |
| 15 | 15105828866 |
| 16 | 21720853898 |
| 17 | 30592580258 |
| 18 | 42299129546 |
| 19 | 57523267202 |
| 20 | 77064337226 |
| 21 | 101850842018 |