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 | 2 |
| 2 | 4 |
| 3 | 7 |
| 4 | 15 |
| 5 | 24 |
| 6 | 50 |
| 7 | 81 |
| 8 | 165 |
| 9 | 266 |
| 10 | 544 |
| 11 | 875 |
| 12 | 1787 |
| 13 | 2876 |
| 14 | 5870 |
| 15 | 9445 |
| 16 | 19281 |
| 17 | 31022 |
| 18 | 63324 |
| 19 | 101887 |
| 20 | 207975 |
| 21 | 334624 |
| 22 | 683050 |
| 23 | 1099001 |
| 24 | 2243325 |
| 25 | 3609426 |
| 26 | 7367704 |
| 27 | 11854355 |
| 28 | 24197587 |
| 29 | 38932996 |
| 30 | 79471590 |
| 31 | 127866765 |
| 32 | 261006761 |