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 | 1 |
| 2 | 1 |
| 3 | 6 |
| 4 | 12 |
| 5 | 19 |
| 6 | 48 |
| 7 | 110 |
| 8 | 218 |
| 9 | 470 |
| 10 | 1040 |
| 11 | 2208 |
| 12 | 4710 |
| 13 | 10184 |
| 14 | 21879 |
| 15 | 46879 |
| 16 | 100767 |
| 17 | 216570 |
| 18 | 464952 |
| 19 | 998613 |
| 20 | 2145312 |
| 21 | 4607724 |
| 22 | 9896436 |
| 23 | 21257196 |
| 24 | 45658624 |
| 25 | 98068864 |
| 26 | 210642412 |
| 27 | 452440320 |
| 28 | 971794317 |
| 29 | 2087314717 |
| 30 | 4483345053 |
| 31 | 9629771966 |
| 32 | 20683772420 |
| 33 | 44426659559 |