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 | 0 |
| 3 | 1 |
| 4 | 7 |
| 5 | 20 |
| 6 | 48 |
| 7 | 100 |
| 8 | 194 |
| 9 | 352 |
| 10 | 615 |
| 11 | 1034 |
| 12 | 1693 |
| 13 | 2705 |
| 14 | 4239 |
| 15 | 6522 |
| 16 | 9889 |
| 17 | 14786 |
| 18 | 21844 |
| 19 | 31913 |
| 20 | 46165 |
| 21 | 66162 |
| 22 | 94035 |
| 23 | 132600 |
| 24 | 185637 |
| 25 | 258128 |
| 26 | 356674 |
| 27 | 489906 |
| 28 | 669173 |
| 29 | 909212 |
| 30 | 1229217 |
| 31 | 1653993 |
| 32 | 2215597 |
| 33 | 2955192 |
| 34 | 3925659 |
| 35 | 5194520 |
| 36 | 6847963 |
| 37 | 8995524 |
| 38 | 11776227 |