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 | 1 |
| 2 | 65 |
| 3 | 1065 |
| 4 | 9065 |
| 5 | 51940 |
| 6 | 227556 |
| 7 | 820260 |
| 8 | 2548260 |
| 9 | 7040385 |
| 10 | 17688385 |
| 11 | 41082041 |
| 12 | 89310585 |
| 13 | 183506960 |
| 14 | 359122960 |
| 15 | 673554960 |
| 16 | 1216893456 |
| 17 | 2126746665 |
| 18 | 3608290665 |
| 19 | 5960927665 |
| 20 | 9613191665 |
| 21 | 15167828676 |
| 22 | 23459298500 |
| 23 | 35626298500 |
| 24 | 53202298500 |
| 25 | 78227501625 |
| 26 | 113386110201 |