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 | 6 |
| 3 | 330 |
| 4 | 3036 |
| 5 | 14820 |
| 6 | 51330 |
| 7 | 142926 |
| 8 | 341880 |
| 9 | 731016 |
| 10 | 1433790 |
| 11 | 2625810 |
| 12 | 4547796 |
| 13 | 7519980 |
| 14 | 11957946 |
| 15 | 18389910 |
| 16 | 27475440 |
| 17 | 40025616 |
| 18 | 57024630 |
| 19 | 79652826 |
| 20 | 109311180 |
| 21 | 147647220 |
| 22 | 196582386 |
| 23 | 258340830 |
| 24 | 335479656 |
| 25 | 430920600 |
| 26 | 547983150 |
| 27 | 690419106 |
| 28 | 862448580 |
| 29 | 1068797436 |
| 30 | 1314736170 |
| 31 | 1606120230 |