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 | 1 |
| 2 | 1 |
| 3 | 3 |
| 4 | 5 |
| 5 | 9 |
| 6 | 20 |
| 7 | 37 |
| 8 | 71 |
| 9 | 137 |
| 10 | 285 |
| 11 | 550 |
| 12 | 1080 |
| 13 | 2123 |
| 14 | 4175 |
| 15 | 8498 |
| 16 | 16711 |
| 17 | 33137 |
| 18 | 65724 |
| 19 | 130368 |
| 20 | 258613 |
| 21 | 521549 |
| 22 | 1034600 |
| 23 | 2060702 |
| 24 | 4104693 |
| 25 | 8176249 |
| 26 | 16286774 |
| 27 | 32443180 |
| 28 | 65149296 |
| 29 | 129777043 |
| 30 | 259032537 |
| 31 | 517030474 |
| 32 | 1032000246 |
| 33 | 2059895799 |
| 34 | 4111615349 |