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 | 1 |
| 3 | 22 |
| 4 | 158 |
| 5 | 674 |
| 6 | 2159 |
| 7 | 5664 |
| 8 | 13004 |
| 9 | 26904 |
| 10 | 51401 |
| 11 | 92094 |
| 12 | 156710 |
| 13 | 255090 |
| 14 | 400359 |
| 15 | 608656 |
| 16 | 900100 |
| 17 | 1299336 |
| 18 | 1836461 |
| 19 | 2546550 |
| 20 | 3472162 |
| 21 | 4661898 |
| 22 | 6173123 |
| 23 | 8071952 |
| 24 | 10434600 |
| 25 | 13346080 |
| 26 | 16905033 |
| 27 | 21221558 |
| 28 | 26419338 |
| 29 | 32636098 |
| 30 | 40027283 |
| 31 | 48761448 |