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 | 3 |
| 2 | 8 |
| 3 | 24 |
| 4 | 68 |
| 5 | 196 |
| 6 | 564 |
| 7 | 1620 |
| 8 | 4660 |
| 9 | 13396 |
| 10 | 38516 |
| 11 | 110740 |
| 12 | 318388 |
| 13 | 915412 |
| 14 | 2631924 |
| 15 | 7567124 |
| 16 | 21756468 |
| 17 | 62552660 |
| 18 | 179847028 |
| 19 | 517083540 |
| 20 | 1486682292 |
| 21 | 4274404564 |
| 22 | 12289467892 |
| 23 | 35333815316 |
| 24 | 101589305140 |
| 25 | 292082437972 |
| 26 | 839774919796 |