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 | 15 |
| 3 | 39 |
| 4 | 87 |
| 5 | 183 |
| 6 | 2071 |
| 7 | 1255 |
| 8 | 1527 |
| 9 | 3063 |
| 10 | 18402 |
| 11 | 12279 |
| 12 | 106327 |
| 13 | 49143 |
| 14 | 622231 |
| 15 | 589794 |
| 16 | 1703767 |
| 17 | 1310695 |
| 18 | 9961111 |
| 19 | 3145719 |
| 20 | 31457210 |
| 21 | 12582903 |
| 22 | 310377127 |
| 23 | 50331639 |
| 24 | 2046816631 |
| 25 | 335544295 |
| 26 | 10603194271 |
| 27 | 8858369762 |
| 28 | 1610612727 |
| 29 | 44023413103 |
| 30 | 40802188951 |