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 | 2 |
| 1 | 18 |
| 2 | 20 |
| 3 | 38 |
| 4 | 58 |
| 5 | 96 |
| 6 | 154 |
| 7 | 250 |
| 8 | 404 |
| 9 | 654 |
| 10 | 1058 |
| 11 | 1712 |
| 12 | 2770 |
| 13 | 4482 |
| 14 | 7252 |
| 15 | 11734 |
| 16 | 18986 |
| 17 | 30720 |
| 18 | 49706 |
| 19 | 80426 |
| 20 | 130132 |
| 21 | 210558 |
| 22 | 340690 |
| 23 | 551248 |
| 24 | 891938 |
| 25 | 1443186 |
| 26 | 2335124 |
| 27 | 3778310 |
| 28 | 6113434 |
| 29 | 9891744 |
| 30 | 16005178 |