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 | 16 |
| 4 | 911 |
| 5 | 8013 |
| 6 | 38130 |
| 7 | 129932 |
| 8 | 358272 |
| 9 | 851710 |
| 10 | 1815124 |
| 11 | 3554910 |
| 12 | 6510729 |
| 13 | 11289019 |
| 14 | 18704640 |
| 15 | 29823436 |
| 16 | 46014402 |
| 17 | 69002190 |
| 18 | 100930284 |
| 19 | 144424446 |
| 20 | 202667301 |
| 21 | 279473821 |
| 22 | 379377584 |
| 23 | 507719550 |
| 24 | 670746120 |
| 25 | 875712560 |
| 26 | 1130992902 |
| 27 | 1446199474 |
| 28 | 1832304547 |
| 29 | 2301777585 |
| 30 | 2868718404 |