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 | 0 |
| 1 | 3 |
| 2 | 10 |
| 3 | 28 |
| 4 | 72 |
| 5 | 154 |
| 6 | 312 |
| 7 | 615 |
| 8 | 1122 |
| 9 | 1995 |
| 10 | 3465 |
| 11 | 5819 |
| 12 | 9575 |
| 13 | 15498 |
| 14 | 24563 |
| 15 | 38378 |
| 16 | 59202 |
| 17 | 90055 |
| 18 | 135420 |
| 19 | 201630 |
| 20 | 297045 |
| 21 | 433741 |
| 22 | 628155 |
| 23 | 902212 |
| 24 | 1286348 |
| 25 | 1821567 |
| 26 | 2562126 |
| 27 | 3581655 |
| 28 | 4977867 |
| 29 | 6879400 |
| 30 | 9457318 |
| 31 | 12936609 |
| 32 | 17610320 |
| 33 | 23863323 |
| 34 | 32196090 |