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 | 121 |
| 3 | 1068 |
| 4 | 4720 |
| 5 | 14705 |
| 6 | 36981 |
| 7 | 80416 |
| 8 | 157368 |
| 9 | 284265 |
| 10 | 482185 |
| 11 | 777436 |
| 12 | 1202136 |
| 13 | 1794793 |
| 14 | 2600885 |
| 15 | 3673440 |
| 16 | 5073616 |
| 17 | 6871281 |
| 18 | 9145593 |
| 19 | 11985580 |
| 20 | 15490720 |
| 21 | 19771521 |
| 22 | 24950101 |
| 23 | 31160768 |
| 24 | 38550600 |
| 25 | 47280025 |
| 26 | 57523401 |
| 27 | 69469596 |
| 28 | 83322568 |
| 29 | 99301945 |