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 | 0 |
| 2 | 34 |
| 3 | 14 |
| 4 | 201 |
| 5 | 604 |
| 6 | 3335 |
| 7 | 13991 |
| 8 | 70095 |
| 9 | 331341 |
| 10 | 1644480 |
| 11 | 8037526 |
| 12 | 39760955 |
| 13 | 194961246 |
| 14 | 961041475 |
| 15 | 4728481549 |
| 16 | 23295012230 |
| 17 | 114728093511 |
| 18 | 565337326343 |
| 19 | 2784889510658 |
| 20 | 13721663522023 |
| 21 | 67604705716170 |
| 22 | 333094024429888 |