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 | 3 |
| 2 | 9 |
| 3 | 22 |
| 4 | 51 |
| 5 | 108 |
| 6 | 221 |
| 7 | 429 |
| 8 | 810 |
| 9 | 1479 |
| 10 | 2640 |
| 11 | 4599 |
| 12 | 7868 |
| 13 | 13209 |
| 14 | 21843 |
| 15 | 35581 |
| 16 | 57222 |
| 17 | 90882 |
| 18 | 142769 |
| 19 | 221910 |
| 20 | 341649 |
| 21 | 521196 |
| 22 | 788460 |
| 23 | 1183221 |
| 24 | 1762462 |
| 25 | 2606604 |
| 26 | 3829437 |
| 27 | 5590110 |
| 28 | 8111346 |
| 29 | 11701998 |
| 30 | 16790136 |
| 31 | 23964594 |
| 32 | 34034391 |
| 33 | 48104069 |
| 34 | 67679109 |
| 35 | 94800537 |
| 36 | 132230021 |
| 37 | 183686994 |
| 38 | 254170332 |