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 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 1 |
| 7 | 5 |
| 8 | 19 |
| 9 | 63 |
| 10 | 184 |
| 11 | 503 |
| 12 | 1300 |
| 13 | 3229 |
| 14 | 7748 |
| 15 | 18106 |
| 16 | 41327 |
| 17 | 92521 |
| 18 | 203601 |
| 19 | 441466 |
| 20 | 944618 |
| 21 | 1997726 |
| 22 | 4180405 |
| 23 | 8665024 |
| 24 | 17805427 |
| 25 | 36299704 |
| 26 | 73468100 |
| 27 | 147704332 |
| 28 | 295122569 |
| 29 | 586304222 |
| 30 | 1158582080 |
| 31 | 2278084748 |
| 32 | 4458522727 |