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) |
|---|---|
| 2 | 1 |
| 3 | 9 |
| 4 | 40 |
| 5 | 195 |
| 6 | 618 |
| 7 | 1751 |
| 8 | 4075 |
| 9 | 8794 |
| 10 | 17015 |
| 11 | 31268 |
| 12 | 53666 |
| 13 | 88781 |
| 14 | 140200 |
| 15 | 215405 |
| 16 | 320013 |
| 17 | 465436 |
| 18 | 659965 |
| 19 | 920114 |
| 20 | 1257580 |
| 21 | 1695303 |
| 22 | 2249206 |
| 23 | 2950131 |
| 24 | 3819135 |
| 25 | 4896590 |
| 26 | 6209683 |
| 27 | 7810096 |
| 28 | 9732230 |
| 29 | 12041009 |
| 30 | 14779220 |
| 31 | 18027113 |
| 32 | 21837121 |
| 33 | 26307056 |
| 34 | 31500345 |