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 | 583 |
| 3 | 820 |
| 4 | 2283 |
| 5 | 5440 |
| 6 | 6783 |
| 7 | 15220 |
| 8 | 33579 |
| 9 | 41400 |
| 10 | 90559 |
| 11 | 197556 |
| 12 | 243139 |
| 13 | 529656 |
| 14 | 1153279 |
| 15 | 1418956 |
| 16 | 3088899 |
| 17 | 6723640 |
| 18 | 8272119 |
| 19 | 18005260 |
| 20 | 39190083 |
| 21 | 48215280 |
| 22 | 104944183 |
| 23 | 228418380 |
| 24 | 281021083 |
| 25 | 611661360 |
| 26 | 1331321719 |
| 27 | 1637912740 |