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 | 12 |
| 3 | 100 |
| 4 | 392 |
| 5 | 1554 |
| 6 | 3486 |
| 7 | 9690 |
| 8 | 18942 |
| 9 | 38610 |
| 10 | 65268 |
| 11 | 125116 |
| 12 | 186870 |
| 13 | 324646 |
| 14 | 472546 |
| 15 | 713354 |
| 16 | 1003888 |
| 17 | 1531908 |
| 18 | 2000638 |
| 19 | 2920970 |
| 20 | 3780950 |