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 | 1 |
| 1 | 7 |
| 2 | 49 |
| 3 | 238 |
| 4 | 1120 |
| 5 | 4263 |
| 6 | 16422 |
| 7 | 54859 |
| 8 | 184275 |
| 9 | 558186 |
| 10 | 1662623 |
| 11 | 4568683 |
| 12 | 12236101 |
| 13 | 30929111 |
| 14 | 75437595 |
| 15 | 176541259 |
| 16 | 394591391 |
| 17 | 858218743 |
| 18 | 1763883894 |
| 19 | 3568259802 |
| 20 | 6746155945 |
| 21 | 12673345045 |
| 22 | 22010823988 |
| 23 | 38263228189 |
| 24 | 60830813459 |
| 25 | 97266114959 |
| 26 | 140728569039 |