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 | 3 |
| 2 | 8 |
| 3 | 16 |
| 4 | 33 |
| 5 | 69 |
| 6 | 153 |
| 7 | 360 |
| 8 | 894 |
| 9 | 2294 |
| 10 | 6060 |
| 11 | 16229 |
| 12 | 44126 |
| 13 | 121021 |
| 14 | 334771 |
| 15 | 931905 |
| 16 | 2608160 |
| 17 | 7333717 |
| 18 | 20703268 |
| 19 | 58652234 |
| 20 | 166684333 |
| 21 | 475034096 |
| 22 | 1357217584 |
| 23 | 3886575564 |
| 24 | 11152863757 |
| 25 | 32065004164 |
| 26 | 92349161271 |
| 27 | 266398439961 |
| 28 | 769616851854 |
| 29 | 2226457643329 |
| 30 | 6449248612381 |
| 31 | 18703413267318 |