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) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 6 |
| 3 | 15 |
| 4 | 27 |
| 5 | 51 |
| 6 | 93 |
| 7 | 159 |
| 8 | 264 |
| 9 | 432 |
| 10 | 696 |
| 11 | 1086 |
| 12 | 1683 |
| 13 | 2553 |
| 14 | 3837 |
| 15 | 5700 |
| 16 | 8367 |
| 17 | 12147 |
| 18 | 17505 |
| 19 | 24972 |
| 20 | 35361 |
| 21 | 49728 |
| 22 | 69402 |
| 23 | 96243 |
| 24 | 132657 |
| 25 | 181782 |
| 26 | 247692 |
| 27 | 335838 |
| 28 | 453042 |
| 29 | 608289 |
| 30 | 813102 |
| 31 | 1082256 |
| 32 | 1434519 |
| 33 | 1894215 |
| 34 | 2491644 |
| 35 | 3265869 |
| 36 | 4265973 |
| 37 | 5553771 |
| 38 | 7207167 |