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 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 3 |
| 5 | 7 |
| 6 | 13 |
| 7 | 32 |
| 8 | 74 |
| 9 | 192 |
| 10 | 497 |
| 11 | 1379 |
| 12 | 3844 |
| 13 | 11111 |
| 14 | 32500 |
| 15 | 96977 |
| 16 | 292600 |
| 17 | 894353 |
| 18 | 2758968 |
| 19 | 8590147 |
| 20 | 26947946 |
| 21 | 85138589 |
| 22 | 270646644 |
| 23 | 865260519 |
| 24 | 2780393959 |
| 25 | 8976443582 |
| 26 | 29104709339 |
| 27 | 94741504408 |
| 28 | 309529405055 |
| 29 | 1014690513653 |
| 30 | 3336805406462 |
| 31 | 11005284876792 |