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 | 2 |
| 2 | 3 |
| 3 | 6 |
| 4 | 13 |
| 5 | 29 |
| 6 | 71 |
| 7 | 173 |
| 8 | 444 |
| 9 | 1148 |
| 10 | 3030 |
| 11 | 8059 |
| 12 | 21715 |
| 13 | 58836 |
| 14 | 160687 |
| 15 | 441083 |
| 16 | 1217134 |
| 17 | 3372386 |
| 18 | 9380948 |
| 19 | 26180962 |
| 20 | 73292358 |
| 21 | 205731862 |
| 22 | 578922864 |
| 23 | 1632707684 |
| 24 | 4614098810 |
| 25 | 13064064882 |
| 26 | 37052720050 |
| 27 | 105257568244 |
| 28 | 299452309023 |
| 29 | 853094139960 |
| 30 | 2433439189419 |