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 | 0 |
| 1 | 1 |
| 2 | 2 |
| 3 | 5 |
| 4 | 13 |
| 5 | 30 |
| 6 | 69 |
| 7 | 156 |
| 8 | 348 |
| 9 | 769 |
| 10 | 1682 |
| 11 | 3653 |
| 12 | 7884 |
| 13 | 16924 |
| 14 | 36160 |
| 15 | 76944 |
| 16 | 163137 |
| 17 | 344770 |
| 18 | 726533 |
| 19 | 1527052 |
| 20 | 3202076 |
| 21 | 6700096 |
| 22 | 13992080 |
| 23 | 29167936 |
| 24 | 60703424 |
| 25 | 126141953 |
| 26 | 261754114 |
| 27 | 542448645 |
| 28 | 1122778124 |
| 29 | 2321317916 |
| 30 | 4794159168 |
| 31 | 9891365008 |
| 32 | 20388823360 |