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 | 0 |
| 1 | 1 |
| 2 | 4 |
| 3 | 11 |
| 4 | 28 |
| 5 | 62 |
| 6 | 137 |
| 7 | 278 |
| 8 | 561 |
| 9 | 1080 |
| 10 | 2051 |
| 11 | 3778 |
| 12 | 6885 |
| 13 | 12255 |
| 14 | 21589 |
| 15 | 37409 |
| 16 | 64160 |
| 17 | 108612 |
| 18 | 182234 |
| 19 | 302461 |
| 20 | 497997 |
| 21 | 812579 |
| 22 | 1316225 |
| 23 | 2115608 |
| 24 | 3378239 |
| 25 | 5357855 |
| 26 | 8447086 |
| 27 | 13237631 |
| 28 | 20632630 |
| 29 | 31985504 |
| 30 | 49339795 |
| 31 | 75738099 |
| 32 | 115731636 |
| 33 | 176055280 |
| 34 | 266697522 |