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 | 4 |
| 3 | 12 |
| 4 | 31 |
| 5 | 77 |
| 6 | 188 |
| 7 | 462 |
| 8 | 1148 |
| 9 | 2887 |
| 10 | 7335 |
| 11 | 18789 |
| 12 | 48419 |
| 13 | 125321 |
| 14 | 325381 |
| 15 | 846713 |
| 16 | 2206891 |
| 17 | 5758797 |
| 18 | 15040102 |
| 19 | 39304237 |
| 20 | 102760572 |
| 21 | 268757551 |
| 22 | 703079117 |
| 23 | 1839625401 |
| 24 | 4814107671 |
| 25 | 12599351527 |
| 26 | 32977310272 |
| 27 | 86319400527 |
| 28 | 225954695164 |
| 29 | 591492569038 |
| 30 | 1548419254590 |