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 | 4 |
| 2 | 10 |
| 3 | 20 |
| 4 | 55 |
| 5 | 76 |
| 6 | 430 |
| 7 | 460 |
| 8 | 2605 |
| 9 | 5164 |
| 10 | 26962 |
| 11 | 38572 |
| 12 | 367645 |
| 13 | 431780 |
| 14 | 3203430 |
| 15 | 8993804 |
| 16 | 33860125 |
| 17 | 63177820 |
| 18 | 636462350 |
| 19 | 803796700 |
| 20 | 6886280971 |
| 21 | 17456594380 |
| 22 | 79965550558 |
| 23 | 139069427020 |
| 24 | 1466861706095 |
| 25 | 2251803181492 |
| 26 | 14434628481170 |
| 27 | 37066691779180 |
| 28 | 214483458079665 |
| 29 | 354963555781060 |
| 30 | 4803855154772166 |