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 | 5 |
| 2 | 29 |
| 3 | 176 |
| 4 | 1093 |
| 5 | 6885 |
| 6 | 43796 |
| 7 | 280600 |
| 8 | 1807781 |
| 9 | 11698223 |
| 10 | 75973189 |
| 11 | 494889092 |
| 12 | 3231947596 |
| 13 | 21153123932 |
| 14 | 138712176296 |
| 15 | 911137377456 |
| 16 | 5993760282021 |
| 17 | 39481335979779 |
| 18 | 260377117268087 |
| 19 | 1719026098532296 |
| 20 | 11360252318843933 |
| 21 | 75141910203168229 |
| 22 | 497431016774189912 |