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) |
|---|---|
| 5 | 1 |
| 6 | 1 |
| 7 | 4 |
| 8 | 9 |
| 9 | 28 |
| 10 | 71 |
| 11 | 198 |
| 12 | 521 |
| 13 | 1418 |
| 14 | 3773 |
| 15 | 10153 |
| 16 | 27114 |
| 17 | 72705 |
| 18 | 194531 |
| 19 | 521447 |
| 20 | 1397482 |
| 21 | 3749836 |
| 22 | 10067417 |
| 23 | 27057233 |
| 24 | 72779710 |
| 25 | 195963184 |
| 26 | 528127752 |
| 27 | 1424707167 |
| 28 | 3846943003 |
| 29 | 10397057771 |
| 30 | 28125235102 |
| 31 | 76149287981 |
| 32 | 206351312858 |
| 33 | 559642013499 |
| 34 | 1519019192097 |