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 | 60 |
| 2 | 690 |
| 3 | 3630 |
| 4 | 13035 |
| 5 | 37059 |
| 6 | 89839 |
| 7 | 193879 |
| 8 | 382834 |
| 9 | 704694 |
| 10 | 1225368 |
| 11 | 2032668 |
| 12 | 3240693 |
| 13 | 4994613 |
| 14 | 7475853 |
| 15 | 10907677 |
| 16 | 15561172 |
| 17 | 21761632 |
| 18 | 29895342 |
| 19 | 40416762 |
| 20 | 53856111 |
| 21 | 70827351 |
| 22 | 92036571 |
| 23 | 118290771 |
| 24 | 150507046 |
| 25 | 189722170 |
| 26 | 237102580 |