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 | 0 |
| 2 | 1 |
| 3 | 1 |
| 4 | 3 |
| 5 | 5 |
| 6 | 13 |
| 7 | 27 |
| 8 | 68 |
| 9 | 160 |
| 10 | 404 |
| 11 | 1010 |
| 12 | 2604 |
| 13 | 6726 |
| 14 | 17661 |
| 15 | 46628 |
| 16 | 124287 |
| 17 | 333162 |
| 18 | 898921 |
| 19 | 2437254 |
| 20 | 6640537 |
| 21 | 18166568 |
| 22 | 49890419 |
| 23 | 137478389 |
| 24 | 380031868 |
| 25 | 1053517588 |
| 26 | 2928246650 |
| 27 | 8158727139 |
| 28 | 22782938271 |
| 29 | 63752461474 |
| 30 | 178740014515 |
| 31 | 502026565792 |
| 32 | 1412409894224 |