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 | 1 |
| 2 | 5 |
| 3 | 11 |
| 4 | 41 |
| 5 | 101 |
| 6 | 301 |
| 7 | 757 |
| 8 | 1981 |
| 9 | 4714 |
| 10 | 11133 |
| 11 | 24763 |
| 12 | 53818 |
| 13 | 111941 |
| 14 | 226857 |
| 15 | 444260 |
| 16 | 848620 |
| 17 | 1576226 |
| 18 | 2862426 |
| 19 | 5077454 |
| 20 | 8827758 |
| 21 | 15043096 |
| 22 | 25183794 |
| 23 | 41434222 |
| 24 | 67108437 |
| 25 | 107051463 |
| 26 | 168402958 |
| 27 | 261384026 |
| 28 | 400684767 |
| 29 | 606936536 |