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 | 6 |
| 2 | 11 |
| 3 | 20 |
| 4 | 41 |
| 5 | 86 |
| 6 | 208 |
| 7 | 514 |
| 8 | 1398 |
| 9 | 3934 |
| 10 | 11576 |
| 11 | 34850 |
| 12 | 107303 |
| 13 | 334396 |
| 14 | 1053851 |
| 15 | 3345320 |
| 16 | 10685570 |
| 17 | 34292064 |
| 18 | 110498897 |
| 19 | 357256018 |
| 20 | 1158492478 |
| 21 | 3766458404 |
| 22 | 12274037845 |
| 23 | 40082339406 |
| 24 | 131144365904 |
| 25 | 429838330172 |
| 26 | 1411104048106 |
| 27 | 4639351259122 |
| 28 | 15273992343065 |