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 | 1 |
| 2 | 8 |
| 3 | 19 |
| 4 | 27 |
| 5 | 74 |
| 6 | 185 |
| 7 | 440 |
| 8 | 1015 |
| 9 | 2294 |
| 10 | 5109 |
| 11 | 10228 |
| 12 | 11252 |
| 13 | 24563 |
| 14 | 53234 |
| 15 | 114673 |
| 16 | 245744 |
| 17 | 524271 |
| 18 | 1114094 |
| 19 | 2359277 |
| 20 | 4980716 |
| 21 | 10485739 |
| 22 | 22020074 |
| 23 | 46137321 |
| 24 | 88080360 |
| 25 | 96468968 |
| 26 | 201326567 |
| 27 | 419430374 |
| 28 | 872415205 |
| 29 | 1811939300 |
| 30 | 15569256417 |