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 | 30 |
| 2 | 231 |
| 3 | 900 |
| 4 | 2701 |
| 5 | 6210 |
| 6 | 12931 |
| 7 | 23400 |
| 8 | 40281 |
| 9 | 63750 |
| 10 | 97951 |
| 11 | 142380 |
| 12 | 202981 |
| 13 | 278250 |
| 14 | 376251 |
| 15 | 494160 |
| 16 | 642481 |
| 17 | 816750 |
| 18 | 1030231 |
| 19 | 1276500 |
| 20 | 1571901 |
| 21 | 1907730 |
| 22 | 2303731 |
| 23 | 2748600 |
| 24 | 3265801 |
| 25 | 3841110 |
| 26 | 4502031 |
| 27 | 5231100 |
| 28 | 6060181 |
| 29 | 6968250 |
| 30 | 7991851 |
| 31 | 9106080 |