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 | 3 |
| 3 | 6 |
| 4 | 13 |
| 5 | 29 |
| 6 | 65 |
| 7 | 148 |
| 8 | 341 |
| 9 | 793 |
| 10 | 1860 |
| 11 | 4395 |
| 12 | 10452 |
| 13 | 24999 |
| 14 | 60097 |
| 15 | 145130 |
| 16 | 351916 |
| 17 | 856502 |
| 18 | 2091599 |
| 19 | 5123437 |
| 20 | 12585354 |
| 21 | 30995031 |
| 22 | 76516348 |
| 23 | 189310421 |
| 24 | 469335998 |
| 25 | 1165790119 |
| 26 | 2900870597 |
| 27 | 7230320746 |
| 28 | 18049387617 |
| 29 | 45123390441 |
| 30 | 112963369113 |
| 31 | 283162526640 |
| 32 | 710664478791 |
| 33 | 1785645155847 |
| 34 | 4491596869206 |