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 | 0 |
| 2 | 10 |
| 3 | 258 |
| 4 | 1740 |
| 5 | 20070 |
| 6 | 48510 |
| 7 | 196920 |
| 8 | 350370 |
| 9 | 937860 |
| 10 | 3075030 |
| 11 | 4322160 |
| 12 | 10641330 |
| 13 | 17925180 |
| 14 | 22825110 |
| 15 | 35827560 |
| 16 | 65816010 |
| 17 | 113180910 |
| 18 | 133937670 |
| 19 | 215070570 |
| 20 | 288148140 |
| 21 | 331474860 |
| 22 | 493573080 |
| 23 | 633015810 |
| 24 | 899599140 |
| 25 | 1387338960 |
| 26 | 1700082450 |
| 27 | 1876303260 |
| 28 | 2272556790 |
| 29 | 2494333710 |