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 | 2 |
| 2 | 6 |
| 3 | 66 |
| 4 | 378 |
| 5 | 1190 |
| 6 | 1470 |
| 7 | 25806 |
| 8 | 58590 |
| 9 | 134946 |
| 10 | 137346 |
| 11 | 170586 |
| 12 | 272610 |
| 13 | 285390 |
| 14 | 420210 |
| 15 | 538734 |
| 16 | 592410 |
| 17 | 618450 |
| 18 | 680706 |
| 19 | 778806 |
| 20 | 1163066 |
| 21 | 1520442 |
| 22 | 1700946 |
| 23 | 2099202 |
| 24 | 2831010 |
| 25 | 4020030 |
| 26 | 4174170 |
| 27 | 4516110 |
| 28 | 5059890 |
| 29 | 5215770 |