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 | 139 |
| 2 | 5997 |
| 3 | 78414 |
| 4 | 553810 |
| 5 | 2677065 |
| 6 | 10009839 |
| 7 | 31098172 |
| 8 | 84004164 |
| 9 | 203427495 |
| 10 | 451263505 |
| 11 | 931565514 |
| 12 | 1811000022 |
| 13 | 3346004389 |
| 14 | 5917977555 |
| 15 | 10077955320 |
| 16 | 16602342664 |
| 17 | 26561396547 |
| 18 | 41402273589 |
| 19 | 63048577990 |
| 20 | 94018466010 |