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) |
|---|---|
| 2 | 6 |
| 3 | 30 |
| 4 | 58 |
| 5 | 210 |
| 6 | 435 |
| 7 | 507 |
| 8 | 2310 |
| 9 | 8435 |
| 10 | 21827 |
| 11 | 29233 |
| 12 | 30030 |
| 13 | 39030 |
| 14 | 62762 |
| 15 | 69914 |
| 16 | 76442 |
| 17 | 78874 |
| 18 | 510510 |
| 19 | 1342785 |
| 20 | 1958673 |
| 21 | 9699690 |
| 22 | 28235362 |
| 23 | 223092870 |
| 24 | 975351895 |
| 25 | 1527890095 |
| 26 | 1885679383 |
| 27 | 2189118743 |
| 28 | 2329696457 |
| 29 | 2338611863 |
| 30 | 3485765789 |
| 31 | 4586671213 |
| 32 | 5453593183 |
| 33 | 5472849253 |
| 34 | 5674340053 |
| 35 | 8071055747 |
| 36 | 8931775397 |
| 37 | 9332889127 |