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 | 1 |
| 2 | 3 |
| 3 | 3 |
| 4 | 8 |
| 5 | 10 |
| 6 | 26 |
| 7 | 38 |
| 8 | 93 |
| 9 | 161 |
| 10 | 381 |
| 11 | 732 |
| 12 | 1721 |
| 13 | 3566 |
| 14 | 8369 |
| 15 | 18316 |
| 16 | 43280 |
| 17 | 98401 |
| 18 | 234959 |
| 19 | 549628 |
| 20 | 1327726 |
| 21 | 3175670 |
| 22 | 7763500 |
| 23 | 18905703 |
| 24 | 46762513 |
| 25 | 115613599 |
| 26 | 289185492 |
| 27 | 724438500 |
| 28 | 1831398264 |
| 29 | 4641907993 |
| 30 | 11853385002 |
| 31 | 30365353560 |