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 | 1 |
| 3 | 17 |
| 4 | 105 |
| 5 | 407 |
| 6 | 1216 |
| 7 | 3036 |
| 8 | 6696 |
| 9 | 13428 |
| 10 | 25005 |
| 11 | 43861 |
| 12 | 73277 |
| 13 | 117471 |
| 14 | 181880 |
| 15 | 273268 |
| 16 | 399960 |
| 17 | 572076 |
| 18 | 801825 |
| 19 | 1103625 |
| 20 | 1494541 |
| 21 | 1994387 |
| 22 | 2626152 |
| 23 | 3416300 |
| 24 | 4395148 |
| 25 | 5596992 |
| 26 | 7060737 |
| 27 | 8830137 |
| 28 | 10954197 |
| 29 | 13487527 |
| 30 | 16490972 |
| 31 | 20031672 |