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 | 5 |
| 4 | 15 |
| 5 | 46 |
| 6 | 136 |
| 7 | 385 |
| 8 | 1072 |
| 9 | 2949 |
| 10 | 8063 |
| 11 | 21977 |
| 12 | 59814 |
| 13 | 162683 |
| 14 | 442329 |
| 15 | 1202507 |
| 16 | 3268905 |
| 17 | 8885983 |
| 18 | 24154809 |
| 19 | 65659808 |
| 20 | 178482121 |
| 21 | 485164996 |
| 22 | 1318815514 |
| 23 | 3584912605 |
| 24 | 9744803182 |
| 25 | 26489121842 |
| 26 | 72004899025 |
| 27 | 195729609091 |
| 28 | 532048240238 |
| 29 | 1446257063900 |
| 30 | 3931334296724 |
| 31 | 10686474581075 |