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 | 3 |
| 4 | 6 |
| 5 | 15 |
| 6 | 75 |
| 7 | 219 |
| 8 | 1335 |
| 9 | 3246 |
| 10 | 4975 |
| 11 | 5475 |
| 12 | 7775 |
| 13 | 8922 |
| 14 | 28614 |
| 15 | 67675 |
| 16 | 69998 |
| 17 | 103135 |
| 18 | 313609 |
| 19 | 548983 |
| 20 | 624193 |
| 21 | 6539595 |
| 22 | 13193562 |
| 23 | 26383395 |
| 24 | 111892866 |
| 25 | 315953675 |
| 26 | 5330142066 |
| 27 | 33738816835 |
| 28 | 66899423586 |
| 29 | 336966134829 |
| 30 | 645835313441 |
| 31 | 742199683475 |
| 32 | 1244107219389 |
| 33 | 10187548490537 |
| 34 | 760354210440662 |