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 | 21 |
| 3 | 147 |
| 4 | 627 |
| 5 | 2002 |
| 6 | 5278 |
| 7 | 12138 |
| 8 | 25194 |
| 9 | 48279 |
| 10 | 86779 |
| 11 | 148005 |
| 12 | 241605 |
| 13 | 380016 |
| 14 | 578956 |
| 15 | 857956 |
| 16 | 1240932 |
| 17 | 1756797 |
| 18 | 2440113 |
| 19 | 3331783 |
| 20 | 4479783 |
| 21 | 5939934 |
| 22 | 7776714 |
| 23 | 10064110 |
| 24 | 12886510 |
| 25 | 16339635 |
| 26 | 20531511 |
| 27 | 25583481 |
| 28 | 31631257 |
| 29 | 38826012 |
| 30 | 47335512 |
| 31 | 57345288 |
| 32 | 69059848 |