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 | 11 |
| 3 | 32 |
| 4 | 90 |
| 5 | 231 |
| 6 | 576 |
| 7 | 1363 |
| 8 | 3141 |
| 9 | 7003 |
| 10 | 15261 |
| 11 | 32468 |
| 12 | 67788 |
| 13 | 138892 |
| 14 | 280103 |
| 15 | 556302 |
| 16 | 1089991 |
| 17 | 2108332 |
| 18 | 4030649 |
| 19 | 7620671 |
| 20 | 14261450 |
| 21 | 26431346 |
| 22 | 48544170 |
| 23 | 88393064 |
| 24 | 159654022 |
| 25 | 286149924 |
| 26 | 509137464 |
| 27 | 899603036 |
| 28 | 1579014769 |