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 | 3 |
| 1 | 8 |
| 2 | 22 |
| 3 | 60 |
| 4 | 162 |
| 5 | 436 |
| 6 | 1174 |
| 7 | 3164 |
| 8 | 8530 |
| 9 | 22996 |
| 10 | 61990 |
| 11 | 167100 |
| 12 | 450434 |
| 13 | 1214196 |
| 14 | 3273014 |
| 15 | 8822812 |
| 16 | 23782962 |
| 17 | 64109844 |
| 18 | 172815814 |
| 19 | 465845884 |
| 20 | 1255743842 |
| 21 | 3385009204 |
| 22 | 9124701142 |
| 23 | 24596733916 |
| 24 | 66303466770 |
| 25 | 178729002068 |
| 26 | 481785610086 |
| 27 | 1298711297084 |
| 28 | 3500833146178 |
| 29 | 9436918539636 |
| 30 | 25438353615990 |