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 | 5 |
| 1 | 46 |
| 2 | 235 |
| 3 | 880 |
| 4 | 2695 |
| 5 | 7150 |
| 6 | 17017 |
| 7 | 37180 |
| 8 | 75790 |
| 9 | 145860 |
| 10 | 267410 |
| 11 | 470288 |
| 12 | 797810 |
| 13 | 1311380 |
| 14 | 2096270 |
| 15 | 3268760 |
| 16 | 4984859 |
| 17 | 7450850 |
| 18 | 10935925 |
| 19 | 15787200 |
| 20 | 22447425 |
| 21 | 31475730 |
| 22 | 43571775 |
| 23 | 59603700 |
| 24 | 80640300 |
| 25 | 107987880 |
| 26 | 143232276 |
| 27 | 188286560 |