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 | 0 |
| 2 | 1 |
| 3 | 3 |
| 4 | 9 |
| 5 | 27 |
| 6 | 33 |
| 7 | 51 |
| 8 | 127 |
| 9 | 1755 |
| 10 | 2805 |
| 11 | 10437 |
| 12 | 71377 |
| 13 | 547233 |
| 14 | 1007727 |
| 15 | 2924109 |
| 16 | 3358515 |
| 17 | 3460299 |
| 18 | 59768775 |
| 19 | 977921175 |
| 20 | 1022225871 |
| 21 | 1769996491 |
| 22 | 5606742245 |
| 23 | 13759209651 |
| 24 | 15569747991 |
| 25 | 120793923335 |
| 26 | 426202820195 |
| 27 | 6287935078637 |
| 28 | 21296868044633 |
| 29 | 25068131362413 |