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 | 6 |
| 2 | 16 |
| 3 | 36 |
| 4 | 92 |
| 5 | 236 |
| 6 | 622 |
| 7 | 1658 |
| 8 | 4468 |
| 9 | 12132 |
| 10 | 33146 |
| 11 | 90998 |
| 12 | 250802 |
| 13 | 693426 |
| 14 | 1922118 |
| 15 | 5339006 |
| 16 | 14854932 |
| 17 | 41387764 |
| 18 | 115438672 |
| 19 | 322267784 |
| 20 | 900314242 |
| 21 | 2516648618 |
| 22 | 7038066876 |
| 23 | 19690060024 |
| 24 | 55102545322 |
| 25 | 154241612986 |