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 | 4 |
| 3 | 12 |
| 4 | 30 |
| 5 | 70 |
| 6 | 159 |
| 7 | 339 |
| 8 | 706 |
| 9 | 1436 |
| 10 | 2853 |
| 11 | 5551 |
| 12 | 10622 |
| 13 | 19975 |
| 14 | 37043 |
| 15 | 67811 |
| 16 | 122561 |
| 17 | 219090 |
| 18 | 387578 |
| 19 | 678977 |
| 20 | 1178769 |
| 21 | 2029115 |
| 22 | 3465056 |
| 23 | 5872648 |
| 24 | 9882301 |
| 25 | 16517284 |
| 26 | 27430358 |
| 27 | 45275673 |
| 28 | 74297072 |
| 29 | 121245153 |
| 30 | 196810381 |
| 31 | 317850809 |
| 32 | 510830685 |
| 33 | 817139589 |
| 34 | 1301251186 |
| 35 | 2063204707 |
| 36 | 3257690903 |
| 37 | 5123047561 |