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 | 12 |
| 1 | 34 |
| 2 | 100 |
| 3 | 298 |
| 4 | 892 |
| 5 | 2674 |
| 6 | 8020 |
| 7 | 24058 |
| 8 | 72172 |
| 9 | 216514 |
| 10 | 649540 |
| 11 | 1948618 |
| 12 | 5845852 |
| 13 | 17537554 |
| 14 | 52612660 |
| 15 | 157837978 |
| 16 | 473513932 |
| 17 | 1420541794 |
| 18 | 4261625380 |
| 19 | 12784876138 |
| 20 | 38354628412 |
| 21 | 115063885234 |
| 22 | 345191655700 |
| 23 | 1035574967098 |
| 24 | 3106724901292 |